Das, Biplajit, et al. “A Review on Bio-Polymers Derived from Animal Sources With Special Reference to Their Potential Applications: Review Bio-Polymer Animal Sources Applications”. Journal of Drug Delivery and Therapeutics, vol. 11, no. 2, Mar. 2021, pp. 209-23, https://doi.org/10.22270/jddt.v11i2.4763.