. (2015). Bulletin of the Iranian Mathematical Society. (e693). Bulletin of the Iranian Mathematical Society, 41(6), e693

. "Bulletin of the Iranian Mathematical Society" .e693 , Bulletin of the Iranian Mathematical Society, 41, 6, 2015, e693.

. (2015). 'Bulletin of the Iranian Mathematical Society', Bulletin of the Iranian Mathematical Society, 41(6), e693.

, "Bulletin of the Iranian Mathematical Society," Bulletin of the Iranian Mathematical Society, 41 6 (2015): e693,

. Bulletin of the Iranian Mathematical Society. BIMS. 2015;41(6):e693.