Rajaram, S., S. R. Dharmalingam, V. Natarajan, K. Ravi, and N. Shanmugam. “An Extensive Review on Hydrogels in Pharmaceutical Drug Delivery Applications”. International Journal of Pharmaceutical Investigation, Vol. 12, no. 2, June 2022, pp. 102-1, doi:10.5530/ijpi.2022.2.20.