. (2017). Bulletin of the Iranian Mathematical Society. (e1131). Bulletin of the Iranian Mathematical Society, 43(3), e1131

. "Bulletin of the Iranian Mathematical Society" .e1131 , Bulletin of the Iranian Mathematical Society, 43, 3, 2017, e1131.

. (2017). 'Bulletin of the Iranian Mathematical Society', Bulletin of the Iranian Mathematical Society, 43(3), e1131.

, "Bulletin of the Iranian Mathematical Society," Bulletin of the Iranian Mathematical Society, 43 3 (2017): e1131,

. Bulletin of the Iranian Mathematical Society. BIMS. 2017;43(3):e1131.