CRISTEA, Irina Elena, 2016, Alp, Murat(TR-NIGDE-M); Davvaz, Bijan(IR-YAZD-M) Pullback and pushout crossed polymodules. (English summary) Proc. Indian Acad. Sci. Math. Sci. 125 (2015), no. 1, 11–20. MathSciNet [na spletu]. 2016. Vol. 1. [Dostopano 3 april 2025]. Pridobljeno s: https://repozitorij.ung.si/IzpisGradiva.php?lang=slv&id=2542