The rings which are Boolean. II. P. Jedlička (2012) Acta Universitatis Carolinae. Mathematica et Physica
Two elementary commutativity theorems for generalized Boolean rings. Gupta, Vishnu (1997) International Journal of Mathematics and Mathematical Sciences
Two results concerning symmetric bi-derivations on prime rings. J. Vukman (1990) Aequationes mathematicae