Document Type : Translation
. (2012). . Mathematical Culture and Thought, 30(3), 61-62.
. "", Mathematical Culture and Thought, 30, 3, 2012, 61-62.
. (2012). '', Mathematical Culture and Thought, 30(3), pp. 61-62.
, "," Mathematical Culture and Thought, 30 3 (2012): 61-62,
. . An Expository Journal of the Iranian Mathematical Society. 2012;30(3):61-62 (In Persian).
