@article{ScholzLeyDachwaldetal.2010,
  author    = {Scholz, A. and Ley, Wilfried and Dachwald, Bernd and Miau, J. J. and Juang, J. C.},
  title     = {Flight results of the COMPASS-1 picosatellite mission},
  series = {Acta Astronautica. 67 (2010), H. 9-10},
  journal   = {Acta Astronautica. 67 (2010), H. 9-10},
  isbn      = {0094-5765},
  pages     = {1289 -- 1298},
  year      = {2010},
  language  = {en}
}
@book{LeyWittmannHallmann2009,
  author    = {Ley, Wilfried and Wittmann, Klaus and Hallmann, Willi},
  title     = {Handbook of space technology},
  publisher = {Wiley},
  address   = {Chichester},
  isbn      = {978-0-470-69739-9},
  pages     = {XIII, 882 S. : Ill., graph. Darst.},
  year      = {2009},
  language  = {en}
}
@article{LeyPlescherScholzetal.2007,
  author    = {Ley, Wilfried and Plescher, Engelbert and Scholz, Artur and Piepenbrock, Johannes},
  title     = {COMPASS-1 picosatellite project / Ley, Wilfried ; Plescher, Engelbert ; Scholz, Artur ; Piepenbrock, Johannes},
  series = {Small satellites for earth observation : digest of the 6th International symposium of the International Academy of Astronautics, Berlin, April 23 - 26, 2007 / ed. by Rainer Sandau; Hans-Peter R{\"o}ser; Arnoldo Valenzuela},
  journal   = {Small satellites for earth observation : digest of the 6th International symposium of the International Academy of Astronautics, Berlin, April 23 - 26, 2007 / ed. by Rainer Sandau; Hans-Peter R{\"o}ser; Arnoldo Valenzuela},
  publisher = {Wissenschaft und Technik Verl.},
  address   = {Berlin},
  isbn      = {9783896855718},
  pages     = {147 -- 150},
  year      = {2007},
  language  = {en}
}
@book{Ley2008,
  author    = {Ley, Wilfried},
  title     = {Handbuch der Raumfahrttechnik / Ley, Wilfried ; Wittmann, Klaus ; Hallmann, Willi [Hrsg.]},
  publisher = {Hanser},
  address   = {M{\"u}nchen},
  isbn      = {978-3-446-41185-2},
  pages     = {814 S. : zahlr. Ill., graph. Darst.},
  year      = {2008},
  language  = {de}
}
@book{Ley1982,
  author    = {Ley, Wilfried},
  title     = {Bewertung von Solarkollektormessungen unter natuerlichen und simulierten Bedingungen},
  publisher = {Inst. f. Raumsimulation},
  address   = {K{\"o}ln},
  pages     = {190 Seiten, 133 Bilder, 19 Tabellen, 43 Quellen},
  year      = {1982},
  language  = {de}
}
@book{Ley1988,
  author    = {Ley, Wilfried},
  title     = {Handbuch der Raumfahrttechnik : Grundlagen - Nutzung, Raumfahrtsysteme - Produktsicherung u. Produktmanagement / Willi Hallmann; Wilfried Ley},
  publisher = {Hanser},
  address   = {M{\"u}nchen [u.a.]},
  isbn      = {3446151303},
  pages     = {XVIII, 792 S : Ill., graph. Darst.},
  year      = {1988},
  language  = {de}
}
@book{Ley1995,
  author    = {Ley, Wilfried},
  title     = {Tr{\"a}gersysteme : Gemeinschaftsveranstaltung der FH Aachen und der DGLR / 8. Raumfahrt-Kolloquium an der Fachhochschule Aachen, 9. November 1995 / Ley, Wilfried [Hrgs.]},
  publisher = {DGLR},
  address   = {Bonn},
  isbn      = {3-922010-92-X},
  pages     = {VII, 245 S. : Ill., graph. Darst.},
  year      = {1995},
  language  = {de}
}
@book{Ley1990,
  author    = {Ley, Wilfried},
  title     = {Seilgefesselte Raumflugk{\"o}rper, -Tethertechnik- : Gemeinschaftsveranstaltung der FH Aachen und der DGLR ... / 3. Raumfahrt-Kolloquium an der Fachhochschule Aachen, 13. Dezember 1990. [Wiss. Programmleitung: W. Ley, W. Hallmann]},
  publisher = {DGLR},
  address   = {Bonn},
  isbn      = {3-922010-59-8},
  pages     = {Getr. Z{\"a}hl. : graph. Darst.},
  year      = {1990},
  language  = {de}
}
@book{Ley1998,
  author    = {Ley, Wilfried},
  title     = {Internationale Raumstation : Konfiguration, Betrieb und Nutzung ; Gemeinschaftsveranstaltung der FH Aachen, der DGLR und des DLR / 11. Raumfahrt-Kolloquium an der Fachhochschule Aachen, 26. November 1998. / Ley, Wilfried [Hrsg.]},
  publisher = {DGLR},
  address   = {Bonn},
  isbn      = {3-932182-04-9},
  pages     = {VIII, 208 S. : Ill., graph. Darst., 30 cm},
  year      = {1998},
  language  = {de}
}
@book{Ley1997,
  author    = {Ley, Wilfried},
  title     = {Raumfahrtmissionen zur Erkundung des Sonnensystems : Gemeinschaftsveranstaltung der FH Aachen, der DGLR und des DLR / 10. Raumfahrt-Kolloquium an der Fachhochschule Aachen, 5. November 1997 / Ley, Wilfried [Hrsg.]},
  publisher = {DGLR},
  address   = {Bonn},
  isbn      = {3-922010-99-7},
  pages     = {VIII, 251 S. : Ill., graph. Darst., 30 cm},
  year      = {1997},
  language  = {de}
}