Уноси

• Commutativity of n-torsion free rings with commuting powers (1988)

  M. Janjić, E. Psomopoulos, Commutativity of n-torsion free rings with commuting powers, RESULTS IN MATHEMATICS, Vol. 3, pp. 135 - 136, 1988

• On rings with commuting powers on subsets (1997)

  M. Janjić, H. Bell, E. Psomopoulos, On rings with commuting powers on subsets, RESULTS IN MATHEMATICS, Vol. 39, pp. 45 - 56, 1997