@article{Alt1978,
  author    = {Alt, Helmut},
  title     = {Wirtschaftlichkeit von Investitionen},
  series = {Elektrizit{\"a}tswirtschaft},
  volume    = {77},
  journal   = {Elektrizit{\"a}tswirtschaft},
  number    = {3},
  publisher = {VWEW-Energieverlag},
  address   = {Frankfurt/Main},
  issn      = {0013-5496},
  pages     = {73 -- 76},
  year      = {1978},
  language  = {de}
}
@article{Alt1978,
  author    = {Alt, Helmut},
  title     = {Intervallschalter mit getrennt einstellbarer Pulszeit und Pulszahl},
  series = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler},
  volume    = {27},
  journal   = {Elektronik : Fachmedium f{\"u}r industrielle Anwender und Entwickler},
  number    = {H. 14},
  publisher = {WEKA Fachmedien},
  address   = {Haar},
  issn      = {0013-5658},
  pages     = {76},
  year      = {1978},
  language  = {de}
}
@book{Alt1979,
  author    = {Alt, Helmut},
  title     = {Angewandte Mathematik, Finanzmathematik, Statistik, Informatik f{\"u}r UPN-Rechner. (Anwendung programmierbarer Taschenrechner ; 1)},
  publisher = {Vieweg},
  address   = {Braunschweig [u.a.]},
  isbn      = {3-528-04150-1},
  pages     = {VIII, 162 S : graph. Darst.},
  year      = {1979},
  language  = {de}
}
@article{Alt1979,
  author    = {Alt, Helmut},
  title     = {Isolierte Freileitungen, ein Betriebsmittel f{\"u}r schwierige Trassenf{\"u}hrung},
  series = {Elektrizit{\"a}tswirtschaft},
  volume    = {Jg. 78},
  journal   = {Elektrizit{\"a}tswirtschaft},
  number    = {H. 10},
  issn      = {0013-5496},
  pages     = {250 -- 256},
  year      = {1979},
  language  = {de}
}
@book{Alt1980,
  author    = {Alt, Helmut},
  title     = {Allgemeine Elektrotechnik, Nachrichtentechnik, Impulstechnik f{\"u}r UPN-Rechner. (Anwendung programmierbarer Taschenrechner ; 2)},
  publisher = {Vieweg},
  address   = {Braunschweig [u.a.]},
  isbn      = {3-528-04151-X},
  pages     = {VII, 109 S. : graph. Darst.},
  year      = {1980},
  language  = {de}
}
@book{Alt1980,
  author    = {Alt, Helmut},
  title     = {Elektrische Energietechnik, Steuerungstechnik, Elektrizit{\"a}tswirtschaft f{\"u}r UPN-Rechner. (Anwendung programmierbarer Taschenrechner ; 6)},
  publisher = {Vieweg},
  address   = {Braunschweig [u.a.]},
  isbn      = {3-528-04180-3},
  pages     = {VIII, 118 S. : graph. Darst.},
  year      = {1980},
  language  = {de}
}
@article{Alt1980,
  author    = {Alt, Helmut},
  title     = {Kurzschlußstromberechnung},
  series = {Elektrizit{\"a}tswirtschaft},
  volume    = {Jg. 79},
  journal   = {Elektrizit{\"a}tswirtschaft},
  number    = {H. 10},
  issn      = {0013-5496},
  pages     = {379 -- 382},
  year      = {1980},
  language  = {de}
}
@article{Alt1981,
  author    = {Alt, Helmut},
  title     = {Wirtschaftlichkeitsberechnung von Investitionen mit dem programmierbaren Taschenrechner},
  series = {3 R international : RRR ; Rohre, Rohrleitungsbau, Rohrleitungstransport},
  volume    = {Jg. 20},
  journal   = {3 R international : RRR ; Rohre, Rohrleitungsbau, Rohrleitungstransport},
  number    = {H. 10},
  issn      = {0340-3386},
  pages     = {561 -- 565},
  year      = {1981},
  language  = {de}
}
@article{Alt1982,
  author    = {Alt, Helmut},
  title     = {Statische oder dynamische Wirtschaftlichkeitsberechnung bei Investitionen zur Energieeinsparung},
  series = {Elektrow{\"a}rme international Edition B: Industrielle Elektrow{\"a}rme : IEW = Industrial applications of electro-heat : EWI ; Zeitschrift f{\"u}r das gesamte Gebiet der Elektrow{\"a}rme in Industrie, Gewerbe und Haushalt},
  volume    = {Jg. 40},
  journal   = {Elektrow{\"a}rme international Edition B: Industrielle Elektrow{\"a}rme : IEW = Industrial applications of electro-heat : EWI ; Zeitschrift f{\"u}r das gesamte Gebiet der Elektrow{\"a}rme in Industrie, Gewerbe und Haushalt},
  number    = {H. 3/4},
  issn      = {0340-3521},
  pages     = {166 -- 172},
  year      = {1982},
  language  = {de}
}
@book{AltSchumny1982,
  author    = {Alt, Helmut and Schumny, Harald},
  title     = {Programmierung mathematischer Algorithmen (Vieweg-Programmbibliothek Taschenrechner ; 1) / Helmut Alt ; Harald Schumny [Hrsg.]},
  publisher = {Vieweg + Teubner},
  address   = {Wiesbaden},
  isbn      = {3-528-04211-7},
  pages     = {92 S.},
  year      = {1982},
  language  = {de}
}