@Book{Révész1957,
author  = "Révész, Géza",
title   = "Die Trias. Analyse der dualen und trialen Systeme",
year    = "1957",
address = "München",
series  = "Sitzungsberichte",
volume  = "1956,10",
url     = "https://publikationen.badw.de/de/006331594",
}