Book Wien--Berlin--Prag: Der Aufstieg der wissenschaftlichen Philosophie: Zentenarien Rudolf Carnap, Hans Reichenbach, Edgar Zilsel (1993). (/isis/citation/CBB000066356/) unapi

Book Uebel, Thomas E. (1991)
Rediscovering the forgotten Vienna Circle: Austrian studies on Otto Neurath and the Vienna Circle. (/isis/citation/CBB000033918/) unapi

Article Chisholm, Roderick M.; Haller, R. (1987)
The descriptive psychology of the Brentano school. Topoi: An International Review of Philosophy (pp. 1-64). (/isis/citation/CBB000061984/) unapi