Nishinaka, Tsunekazu A commutativity theorem for rings. (English) Zbl 0717.16027 Rad. Mat. 6, No. 2, 357-359 (1990). Reviewer: P.Koshlukov MSC: 16U70 16R50 16U80 PDF BibTeX XML Cite \textit{T. Nishinaka}, Rad. Mat. 6, No. 2, 357--359 (1990; Zbl 0717.16027)
Komatsu, Hiroaki; Tominaga, Hisao Chacron’s condition and commutativity theorems. (English) Zbl 0705.16023 Math. J. Okayama Univ. 31, 101-120 (1989). Reviewer: H.E.Bell MSC: 16U70 16R50 PDF BibTeX XML Cite \textit{H. Komatsu} and \textit{H. Tominaga}, Math. J. Okayama Univ. 31, 101--120 (1989; Zbl 0705.16023)