Gupta, Hajra AS., et al. “An Economical, Agri-Compliant and Environmentally Sustainable ‘Sponge Culture’ Method for Large-Scale Production of Actinopigments from Soil Actinomycetes”. International Journal of Scientific Research in Biological Sciences, vol. 7, no. 4, Aug. 2020, pp. 7-13, https://ijsrbs.isroset.org/index.php/j/article/view/379.