@book{Hoever2013,
  author    = {Hoever, Georg},
  title     = {H{\"o}here Mathematik kompakt},
  publisher = {Springer},
  address   = {Berlin},
  isbn      = {978-3-642-30334-0},
  pages     = {X, 245 S.},
  year      = {2013},
  language  = {de}
}
@book{Hoever2013,
  author    = {Hoever, Georg},
  title     = {Arbeitsbuch h{\"o}here Mathematik : Aufgaben mit vollst{\"a}ndig durchgerechneten L{\"o}sungen},
  publisher = {Springer},
  address   = {Berlin},
  isbn      = {978-3-642-30336-4},
  pages     = {XII, 524 S.},
  year      = {2013},
  language  = {de}
}
@book{Helmig2013,
  author    = {Helmig, Ilka},
  title     = {Ph{\´e}notype : [anl{\"a}sslich der Ausstellung "Ilka Helmig, Ph{\´e}notype" im Ludwig Forum Aachen, 30. Juni - 01. September 2013]},
  editor    = {Franzen, Brigitte},
  publisher = {Ludwig-Forum},
  address   = {Aachen},
  isbn      = {978-3-929292-50-3},
  pages     = {112 S. : {\"u}berw. Ill.},
  year      = {2013},
  language  = {de}
}
@book{Gebhardt2013,
  author    = {Gebhardt, Andreas},
  title     = {Generative Fertigungsverfahren : Additive Manufacturing und 3D Drucken f{\"u}r Prototyping - Tooling - Produktion},
  edition   = {4., neu bearbeitete und erweiterte Auflage},
  publisher = {Hanser},
  address   = {M{\"u}nchen},
  isbn      = {978-3-446-43651-0 ; 978-3-446-43652-7},
  doi       = {10.3139/9783446436527},
  pages     = {XXIV, 637 S. : zahlr. Ill. u. graph. Darst.},
  year      = {2013},
  language  = {de}
}
@book{Gartzen2013,
  author    = {Gartzen, Johannes},
  title     = {Innovation durch Kooperation : wie der Mittelstand durch Zusammenarbeit mit den Hochschulen seine Wettbewerbsf{\"a}higkeit steigert : Festschrift f{\"u}r Prof. Dr. rer. nat. Johannes Gartzen},
  publisher = {Apprimus Verl.},
  address   = {Aachen},
  isbn      = {978-3-86359-136-6},
  pages     = {III, 188 S. : Ill.},
  year      = {2013},
  language  = {de}
}
@book{Esch2013,
  author    = {Esch, Thomas},
  title     = {Experimentelle Untersuchungen an Antriebssystemen von Kraft-, Luft- und Raumfahrzeugen : Vorlesungsumdruck. 2. Aufl. Bd. 1},
  edition   = {2. Aufl.},
  publisher = {Fachhochschule Aachen, Lehr- und Forschungsgebiet Thermodynamik und Verbrennungstechnik},
  address   = {Aachen},
  pages     = {Getr. Z{\"a}hlung : Ill. und graph. Darst.},
  year      = {2013},
  language  = {de}
}
@book{Esch2013,
  author    = {Esch, Thomas},
  title     = {Verbrennungsmotoren},
  edition   = {10. Aufl., [Umdruck]},
  publisher = {Fachhochschule Aachen, Lehr- und Forschungsgebiet Thermodynamik und Verbrennungstechnik},
  address   = {Aachen},
  pages     = {Getr. Z{\"a}hlung : Ill. und graph. Darst.},
  year      = {2013},
  language  = {de}
}
@book{DavidBenkner2013,
  author    = {David, Klaus and Benkner, Thorsten},
  title     = {Digitale Mobilfunksysteme},
  number    = {Repr. 1996},
  publisher = {Vieweg \& Teubner},
  address   = {Wiesbaden},
  isbn      = {978-3-322-92768-2},
  pages     = {XIII, 458 S.},
  year      = {2013},
  language  = {de}
}
@book{BochmannRitz2013,
  author    = {Bochmann, Sandra and Ritz, Thomas},
  title     = {Prototyping tools for mobile applications},
  publisher = {Steinbeis-Ed.},
  address   = {Stuttgart},
  isbn      = {978-3-943356-45-8},
  pages     = {234 S. : Ill., graph. Darst.},
  year      = {2013},
  language  = {en}
}
@book{BenkoePlescher2013,
  author    = {Benk{\"o}, Marietta and Plescher, Engelbert},
  title     = {Space law: reconsidering the definition/delimitation question and the passage of spacecraft through foreign airspace. (Essential air and space law ; 12)},
  publisher = {Eleven International Publishing},
  address   = {The Hague},
  isbn      = {9789462360761 ; 9462360766 ; 9789460948176},
  pages     = {VII, 159 S.},
  year      = {2013},
  language  = {en}
}