Document Type : Translation
. (2011). . Mathematical Culture and Thought, 30(2), 15-17.
. "", Mathematical Culture and Thought, 30, 2, 2011, 15-17.
. (2011). '', Mathematical Culture and Thought, 30(2), pp. 15-17.
, "," Mathematical Culture and Thought, 30 2 (2011): 15-17,
. . An Expository Journal of the Iranian Mathematical Society. 2011;30(2):15-17 (In Persian).
