. (2017). Bulletin of the Iranian Mathematical Society. (e989). Bulletin of the Iranian Mathematical Society, 43(1), e989

. "Bulletin of the Iranian Mathematical Society" .e989 , Bulletin of the Iranian Mathematical Society, 43, 1, 2017, e989.

. (2017). 'Bulletin of the Iranian Mathematical Society', Bulletin of the Iranian Mathematical Society, 43(1), e989.

, "Bulletin of the Iranian Mathematical Society," Bulletin of the Iranian Mathematical Society, 43 1 (2017): e989,

. Bulletin of the Iranian Mathematical Society. BIMS. 2017;43(1):e989.