Seiffert, Helmut (2001) [1996]. Einführung in die Wissenschaftstheorie: Handlungstheorie - Modallogik - Ethik - Systemtheorie - Literatur zu dem Bänden 1–3. Beck'sche Reihe (in German). Vol. 3 (3 ed.). Munich, Germany: C. H. Beck oHG. p. 164. ISBN 3-406-36450-0. No. 270. Retrieved 2022-02-04. (232 pages) 3-406-36450-0
Seiffert uses AV as abbreviation for Akademie Verlag, however, this is also used for Akademische Verlagsgesellschaft (normally as AVG) by others. - Seiffert, Helmut (2001) [1996]. Einführung in die Wissenschaftstheorie: Handlungstheorie - Modallogik - Ethik - Systemtheorie - Literatur zu dem Bänden 1–3. Beck'sche Reihe (in German). Vol. 3 (3 ed.). Munich, Germany: C. H. Beck oHG. p. 164. ISBN 3-406-36450-0. No. 270. Retrieved 2022-02-04. https://books.google.com/books?id=Iw5TFZrirzkC&pg=PA164
"De Gruyter kauft die Wissenschaftsverlage Oldenbourg und Akademie" (in German). 2013-02-26. Archived from the original on 2013-03-18. https://web.archive.org/web/20130318111607/https://www.degruyter.com/applib/newsitem/60/de-gruyter-kauft-die-wissenschaftsverlage-oldenbourg-und-akademie
"Akademie Verlag Book Archive | De Gruyter". www.degruyter.com. Retrieved 2023-06-21. https://www.degruyter.com/publishing/services/for-librarians/product-information/e-books/akademie-verlag-book-archive?lang=en