B. Das, S. Paul, and H. K. Sharma, “A Review on Bio-Polymers Derived from Animal Sources with Special Reference to their Potential Applications: Review bio-polymer animal sources applications”, J. Drug Delivery Ther., vol. 11, no. 2, pp. 209–223, Mar. 2021, doi: 10.22270/jddt.v11i2.4763.