International Journal of Microbiology Research Volume-1 Issue-2
Yogesh Khairnar, et al "Study of pectinase production in submerged fermentation using different strains of Aspergillus Niger." International Journal of Microbiology Research 1.2 (2009):13-17. http://dx.doi.org/10.9735/0975-5276.1.2.13-17