On a problem of commutativity of automorphisms. Chaudhry, M.Anwar; Thaheem, A.B. — 1998 International Journal of Mathematics and Mathematical Sciences
A note on commutativity of automorphisms. Samman, M.S.; Chaudhry, M.Anwar; Thaheem, A.B. — 1998 International Journal of Mathematics and Mathematical Sciences