@InCollection{,
  Year    = "2019", 
  Title    = "Stelzer, Prof. Dr.-Ing. Ralph", 
  Author    = "", 
  Booktitle    = "Gronau, Norbert ; Becker, Jörg ; Kliewer, Natalia ; Leimeister, Jan Marco ; Overhage, Sven (Herausgeber): Enzyklopädie der Wirtschaftsinformatik – Online-Lexikon",
  Publisher    = "Berlin : GITO",
  Url    = "https://wi-lex.de/index.php/autoren/autorenverzeichnis/stelzer-prof-dr-ing-ralph/", 
  Note    = "[Online; Stand 3. December 2024]",
}