(2017). Bulletin of the Iranian Mathematical Society. (e1254). Bulletin of the Iranian Mathematical Society, 43(6), e1254

. "Bulletin of the Iranian Mathematical Society" .e1254 , Bulletin of the Iranian Mathematical Society, 43, 6, 2017, e1254.

(2017). 'Bulletin of the Iranian Mathematical Society', Bulletin of the Iranian Mathematical Society, 43(6), e1254.

, "Bulletin of the Iranian Mathematical Society," Bulletin of the Iranian Mathematical Society, 43 6 (2017): e1254,

Bulletin of the Iranian Mathematical Society. BIMS, 2017; 43(6): e1254.