ALI, Shakir, FOŠNER, Ajda in KHAN, Mohammad Salahuddin, 2013, A note on commutativity of rings with additive mappings. [na spletu]. 2013. Vol. 19, no. 2, p. 199–204. [Dostopano 5 april 2025]. Pridobljeno s: http://dx.doi.org/10.1016/j.ajmsc.2012.10.002