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. "Bulletin of the Iranian Mathematical Society" .e608 , Bulletin of the Iranian Mathematical Society, 41, 2, 2015, e608.

. (2015). 'Bulletin of the Iranian Mathematical Society', Bulletin of the Iranian Mathematical Society, 41(2), e608.

, "Bulletin of the Iranian Mathematical Society," Bulletin of the Iranian Mathematical Society, 41 2 (2015): e608,

. Bulletin of the Iranian Mathematical Society. BIMS. 2015;41(2):e608.