Document Type : Translation
. (2011). . Mathematical Culture and Thought, 29(2), 75-78.
. "", Mathematical Culture and Thought, 29, 2, 2011, 75-78.
. (2011). '', Mathematical Culture and Thought, 29(2), pp. 75-78.
, "," Mathematical Culture and Thought, 29 2 (2011): 75-78,
. . An Expository Journal of the Iranian Mathematical Society. 2011;29(2):75-78 (In Persian).
