. (2006). . Mathematical Culture and Thought, 25(2), 71-89.
. "", Mathematical Culture and Thought, 25, 2, 2006, 71-89.
. (2006). '', Mathematical Culture and Thought, 25(2), pp. 71-89.
, "," Mathematical Culture and Thought, 25 2 (2006): 71-89,
. . An Expository Journal of the Iranian Mathematical Society. 2006;25(2):71-89 (In Persian).
