Document Type : Translation
. (1999). . Mathematical Culture and Thought, 18(1), 53-58.
. "", Mathematical Culture and Thought, 18, 1, 1999, 53-58.
. (1999). '', Mathematical Culture and Thought, 18(1), pp. 53-58.
, "," Mathematical Culture and Thought, 18 1 (1999): 53-58,
. . An Expository Journal of the Iranian Mathematical Society. 1999;18(1):53-58 (In Persian).
