Nawaz, Z., N. A. Sheikh, and J. R. Khan. “PHYSICAL MASS TRANSFER MODEL AND SCALE-UP DESIGN PROCEDURE FOR AEROBIC BIOREACTORS”. The Nucleus, vol. 43, no. 1-4, July 2020, pp. 159-65, http://thenucleuspak.org.pk/index.php/Nucleus/article/view/1036.