(1)
Nadeem, A. N.; Jafri, S. A.; Baig, S.; Irfan, M.; Syed, Q. Short Communication Optimization of Substrate Concentration for Enhanced Citric Acid Production by Aspergillus Niger M-101: Short Communication: Citric Acid Production by A. Niger. Pakistan Journal of Scientific & Industrial Research 2009, 52, 275-277.