@article{Helsper1979,
  author    = {Helsper, Christoph},
  title     = {Evaluation of Particle Size Distributions by Means of Particle Counters / Fißan, H. J. ; Helsper, C.},
  series = {Proceedings of the First Workshop of Particulate Control : 16. - 17. March 1978, Kernforschung-sanlage J{\"u}lich GmbH / prepared by U.S. Environmental Protection Agency, Off. of Research and Development, Washington, D.C, 1979,},
  journal   = {Proceedings of the First Workshop of Particulate Control : 16. - 17. March 1978, Kernforschung-sanlage J{\"u}lich GmbH / prepared by U.S. Environmental Protection Agency, Off. of Research and Development, Washington, D.C, 1979,},
  publisher = {Zentralbibliothek d. Kernforschungsanlage J{\"u}lich [in Komm.]},
  address   = {J{\"u}lich},
  pages     = {495 S.: Ill., graph. Darst.},
  year      = {1979},
  language  = {en}
}
@book{Helsper1981,
  author    = {Helsper, Christoph},
  title     = {Bestimmung, Simulation und Korrektur des nichtidealen {\"U}bertragungsverhaltens klassifizierender Aerosolmeßverfahren},
  publisher = {Univ.-Gesamthochsch},
  address   = {Duisburg},
  pages     = {65 S.},
  year      = {1981},
  language  = {de}
}
@article{Helsper1986,
  author    = {Helsper, Christoph},
  title     = {Kondensationskernz{\"a}hler und ihre Anwendung in der Reinraumtechnik},
  series = {Swiss Chem. 8 (1986)},
  journal   = {Swiss Chem. 8 (1986)},
  isbn      = {0251-1703},
  pages     = {63 -- 66},
  year      = {1986},
  language  = {de}
}
@article{Helsper1986,
  author    = {Helsper, Christoph},
  title     = {Measurement Techniques For Ultrafine Particles},
  series = {Ultrafine aerosols. Properties and behaviour. Proceedings of the 1. International Workshop on Ultrafine Aerosols of the Sonderforschungsbereich 209 'Stoff- und Energietransport in Aerosolen' -'Mass and energy transfer in aerosols'-, held at the Univ. of Duisburg on Sept. 29, 1986},
  journal   = {Ultrafine aerosols. Properties and behaviour. Proceedings of the 1. International Workshop on Ultrafine Aerosols of the Sonderforschungsbereich 209 'Stoff- und Energietransport in Aerosolen' -'Mass and energy transfer in aerosols'-, held at the Univ. of Duisburg on Sept. 29, 1986},
  address   = {Duisburg},
  year      = {1986},
  language  = {en}
}
@article{Helsper1993,
  author    = {Helsper, Christoph},
  title     = {Integrit{\"a}tspr{\"u}fung an LF-Anlagen mit Hilfe von Pr{\"u}faerosolen},
  series = {Pharma-Technologie-Journal. 14 (1993), H. 2},
  journal   = {Pharma-Technologie-Journal. 14 (1993), H. 2},
  isbn      = {0931-9700},
  pages     = {36 -- 42},
  year      = {1993},
  language  = {de}
}
@article{Helsper1995,
  author    = {Helsper, Christoph},
  title     = {Probleme der Staubprobenahme bei der Filterpr{\"u}fung},
  series = {Filtrieren und Separieren (1995)},
  journal   = {Filtrieren und Separieren (1995)},
  isbn      = {0933-5927},
  pages     = {5 -- 13},
  year      = {1995},
  language  = {de}
}
@article{Helsper2002,
  author    = {Helsper, Christoph},
  title     = {Partikelmesstechnik},
  series = {Reinraumtechnik , Hrsg.: Gail, Lothar},
  journal   = {Reinraumtechnik , Hrsg.: Gail, Lothar},
  publisher = {Springer},
  address   = {Berlin [u.a.]},
  isbn      = {3-540-66885-3},
  pages     = {57 -- 82},
  year      = {2002},
  language  = {de}
}
@article{Helsper2003,
  author    = {Helsper, Christoph},
  title     = {Messverfahren zur Charakterisierung der Abscheidung luftgetragener Partikel in Filtern},
  series = {Schutzmaßnahmen vor mikrobiellen Belastungen des Innenraumes / VII. L{\"u}becker Fachtagung f{\"u}r Umwelthygiene. [Hrsg.:] Reinhard Keller ...},
  journal   = {Schutzmaßnahmen vor mikrobiellen Belastungen des Innenraumes / VII. L{\"u}becker Fachtagung f{\"u}r Umwelthygiene. [Hrsg.:] Reinhard Keller ...},
  publisher = {Inst. f. Medizinische Mikrobiologie u. Hygiene d. Med. Univ.},
  address   = {L{\"u}beck},
  pages     = {35 -- 61},
  year      = {2003},
  language  = {de}
}
@article{Helsper1988,
  author    = {Helsper, Christoph},
  title     = {Kondensationskernz{\"a}hler in der Reinraummeßtechnik - Meßbereichsgrenzen nach unten verschoben},
  series = {Reinraumtechnik. 5 (1988)},
  journal   = {Reinraumtechnik. 5 (1988)},
  pages     = {36 -- 39},
  year      = {1988},
  language  = {de}
}
@techreport{HellmannsHesse2007,
  author    = {Hellmanns, Mark and Hesse, Joachim},
  title     = {Ger{\"a}uschminderung und Leichtbau in Leistungsgetrieben durch den Einsatz von Werkstoffverbunden : Abschlussbericht zu Nr. 3.1 : Berichtszeitraum: 1.3.2005 - 31.8.2007},
  publisher = {Bundesministerium f{\"u}r Wirtschaft und Arbeit (BMWi)},
  address   = {Berlin},
  pages     = {66 S.},
  year      = {2007},
  language  = {de}
}
@inproceedings{HellmannsHesse2007,
  author    = {Hellmanns, Mark and Hesse, Joachim},
  title     = {Ger{\"a}uschminderung und Leichtbau in Leistungsgetrieben durch den Einsatz von Werkstoffverbunden},
  series = {Hybride Maschinenkonzepte und intelligente Verfahren zur Fertigung von High-Tech-Produkten : Erfolgsbeispiele zur Standortsicherung in Hochlohnl{\"a}ndern : InnoNet Kolloquium am 7. und 8.11.2007, Technologiezentrum am Europaplatz Aachen},
  booktitle = {Hybride Maschinenkonzepte und intelligente Verfahren zur Fertigung von High-Tech-Produkten : Erfolgsbeispiele zur Standortsicherung in Hochlohnl{\"a}ndern : InnoNet Kolloquium am 7. und 8.11.2007, Technologiezentrum am Europaplatz Aachen},
  pages     = {1 -- 46},
  year      = {2007},
  language  = {de}
}
@inproceedings{HellmannsHartungDilgeretal.2009,
  author    = {Hellmanns, Mark and Hartung, I. and Dilger, Klaus and B{\"o}hm, Stefan},
  title     = {Quality assurance of manual guided joining and welding devices},
  series = {Proceedings of the IIW International Conference on Advances in Welding and Allied Technologies : July 16 - 17, 2009, Singapore},
  booktitle = {Proceedings of the IIW International Conference on Advances in Welding and Allied Technologies : July 16 - 17, 2009, Singapore},
  publisher = {International Institute of Welding},
  address   = {Roissy},
  isbn      = {9789810832605},
  pages     = {219 -- 222},
  year      = {2009},
  language  = {en}
}
@inproceedings{HellmannsFischerDilger2013,
  author    = {Hellmanns, Mark and Fischer, F. and Dilger, Klaus},
  title     = {Applikation und Einsatz von faserverst{\"a}rkten Klebstoffen im Bauwesen},
  series = {Tagungsband / 13. Kolloquium Gemeinsame Forschung in der Klebtechnik : 26. und 27. Februar 2013, Frankfurt am Main},
  booktitle = {Tagungsband / 13. Kolloquium Gemeinsame Forschung in der Klebtechnik : 26. und 27. Februar 2013, Frankfurt am Main},
  publisher = {DECHEMA},
  address   = {Frankfurt a.M.},
  organization    = {DECHEMA, Gesellschaft f{\"u}r Chemische Technik und Biotechnologie},
  pages     = {61 -- 62},
  year      = {2013},
  language  = {de}
}
@inproceedings{HellmannsFischerDilgeretal.2014,
  author    = {Hellmanns, Mark and Fischer, F. and Dilger, K. and Wittor, B. and Hildebrand, J. and Werner, F.},
  title     = {Applikation und Einsatz von faserverst{\"a}rkten Klebstoffen im Bauwesen abgeschlossenes IGF-Projekt Nr. 16956 B (DVS 08.072, Laufzeit 01.02.2011 - 31.01.2013)},
  series = {Tagungsband / 14. Kolloquium Gemeinsame Forschung in der Klebtechnik : 18. und 19. Februar 2014, DECHEMA-Haus, Frankfurt am Main},
  booktitle = {Tagungsband / 14. Kolloquium Gemeinsame Forschung in der Klebtechnik : 18. und 19. Februar 2014, DECHEMA-Haus, Frankfurt am Main},
  organization    = {DECHEMA, Gesellschaft f{\"u}r Chemische Technik und Biotechnologie},
  pages     = {26 -- 27},
  year      = {2014},
  language  = {de}
}
@inproceedings{HellmannsBoehmDilgeretal.2006,
  author    = {Hellmanns, Mark and B{\"o}hm, Stefan and Dilger, Klaus and Welters, T.},
  title     = {Neue M{\"o}glichkeiten der Klebstoffverarbeitung durch geschwindigkeitsproportionalen Handauftrag},
  series = {Adhesive bonding and hybrid bonding in body-in-white shop and assembly : proceedings, 25/26 April 2006, Bad Nauheim/Frankfurt},
  booktitle = {Adhesive bonding and hybrid bonding in body-in-white shop and assembly : proceedings, 25/26 April 2006, Bad Nauheim/Frankfurt},
  publisher = {Technik \& Kommunikation Verl.-GmbH},
  address   = {Berlin},
  pages     = {81},
  year      = {2006},
  language  = {de}
}
@inproceedings{HellmannsBoehmDilger2008,
  author    = {Hellmanns, Mark and B{\"o}hm, Stefan and Dilger, Klaus},
  title     = {Weight and noise reduction in power transmissions through epoxy resin foams},
  series = {Proceedings of the 31st annual meeting of the Adhesion Society : 17. - 20.2.2008, Austin, Texas},
  booktitle = {Proceedings of the 31st annual meeting of the Adhesion Society : 17. - 20.2.2008, Austin, Texas},
  publisher = {Adhesion Society},
  address   = {Blacksburg},
  organization    = {Adhesion Society},
  pages     = {291 -- 293},
  year      = {2008},
  language  = {en}
}
@inproceedings{HellmannsBoehmDilger2006,
  author    = {Hellmanns, Mark and B{\"o}hm, Stefan and Dilger, Klaus},
  title     = {Implementation of a velocity controlled manual applicator for adhesives and sealants in the automotive industry in consideration of quality control},
  series = {Proceedings of the 29th annual meeting of the Adhesion Society : 19. - 22.2.2006, Jacksonville, Florida},
  booktitle = {Proceedings of the 29th annual meeting of the Adhesion Society : 19. - 22.2.2006, Jacksonville, Florida},
  publisher = {Adhesion Society},
  address   = {Blacksburg, Va.},
  organization    = {Adhesion Society},
  issn      = {1086-9506},
  pages     = {68 -- 70},
  year      = {2006},
  language  = {en}
}
@article{HellmannsBoehmDilger2006,
  author    = {Hellmanns, Mark and B{\"o}hm, Stefan and Dilger, Klaus},
  title     = {Manual applications of adhesives},
  series = {Journal of adhesion and interface},
  volume    = {Vol. 7},
  journal   = {Journal of adhesion and interface},
  number    = {No. 4},
  pages     = {24 -- 27},
  year      = {2006},
  language  = {en}
}
@inproceedings{HellmannsBoehmDilger2006,
  author    = {Hellmanns, Mark and B{\"o}hm, Stefan and Dilger, Klaus},
  title     = {Progress of the manual application of adhesives},
  series = {Proceedings of the 3rd World Congress on Adhesion and Related Phenomena : WCARP-III, October 15 -18, 2006, Beijing, China},
  booktitle = {Proceedings of the 3rd World Congress on Adhesion and Related Phenomena : WCARP-III, October 15 -18, 2006, Beijing, China},
  publisher = {Beijing Adhesion Society of China},
  address   = {Beijing},
  pages     = {275 -- 277},
  year      = {2006},
  language  = {en}
}
@phdthesis{Hellmanns2012,
  author    = {Hellmanns, Mark},
  title     = {Qualit{\"a}tssicherung von handgef{\"u}hrten Applikationsprozessen durch Nachverfolgung der Handhabungseinheit. (Fortschrittsberichte aus der Produktionstechnik ; 1)},
  publisher = {Aachen},
  address   = {Shaker},
  isbn      = {978-3-8440-1379-5},
  pages     = {XIV, 99 S. : Ill., graph. Darst.},
  year      = {2012},
  language  = {de}
}