Mazhar, R., Rehman, A.- ur-., Sadiq, A., Ali, S., Waheed, A. and Haq, I.-. 2004. STUDYOF SOME KINETIC PARAMETERS FOR CITRIC ACID BIOSYNTHESISBY ASPERGILLUSNIGER MUTANT NG - 110 USING SHAKE FLASK TECHNIQUE: Short Communication. Biological Sciences - PJSIR. 47, 2 (Apr. 2004), 157–159.