BREŠAR, Matej, 2006, Çeven, Yilmaz(TR-CUMS); Ozturk, Mehmet Ali(TR-CUMS): On the trace of a permuting tri-additive mapping in left s-unital rings. (English summary). - Int. J. Pure Appl. Math. 23 (2005), no. 4, 465--474. [na spletu]. 2006. [Dostopano 13 marec 2025]. Pridobljeno s: http://www.ams.org/mathscinet/pdf/2175013.pdf