. (2013). . Mathematical Culture and Thought, 31(3), 69-82.
. "", Mathematical Culture and Thought, 31, 3, 2013, 69-82.
. (2013). '', Mathematical Culture and Thought, 31(3), pp. 69-82.
, "," Mathematical Culture and Thought, 31 3 (2013): 69-82,
. . An Expository Journal of the Iranian Mathematical Society. 2013;31(3):69-82 (In Persian).
