S. A. . Ghanbartabar, G. D. . Najafpour, and M. . Mohammadi, “COMPARATIVE STUDIES ON CITRIC ACID PRODUCTION FROM CHEESE WHY BY SUBMERGED AND IMMOBILIZED ASPERGILLUS NIGER”, Pak. J. Biotechnol, vol. 13, no. 2, pp. 79–85, Mar. 2016.