Document Type : Opinion
. (2017). . Mathematical Culture and Thought, 36(2), 125-130.
. "", Mathematical Culture and Thought, 36, 2, 2017, 125-130.
. (2017). '', Mathematical Culture and Thought, 36(2), pp. 125-130.
, "," Mathematical Culture and Thought, 36 2 (2017): 125-130,
. . An Expository Journal of the Iranian Mathematical Society. 2017;36(2):125-130 (In Persian).