YAMAK, S. Et Al. 2010. Generalized lower and upper approximations in a ring. INFORMATION SCIENCES , vol.180, no.9 , 1759-1768.

YAMAK, S., KAZANCI, O., & Davvaz, B., (2010). Generalized lower and upper approximations in a ring. INFORMATION SCIENCES , vol.180, no.9, 1759-1768.

YAMAK, SULTAN, OSMAN KAZANCI, And B. Davvaz. "Generalized lower and upper approximations in a ring," INFORMATION SCIENCES , vol.180, no.9, 1759-1768, 2010

YAMAK, SULTAN Et Al. "Generalized lower and upper approximations in a ring." INFORMATION SCIENCES , vol.180, no.9, pp.1759-1768, 2010

YAMAK, S. KAZANCI, O. And Davvaz, B. (2010) . "Generalized lower and upper approximations in a ring." INFORMATION SCIENCES , vol.180, no.9, pp.1759-1768.

@article{article, author={SULTAN YAMAK Et Al. }, title={Generalized lower and upper approximations in a ring}, journal={INFORMATION SCIENCES}, year=2010, pages={1759-1768} }