Das , Prerona, et al. “Comparative Study of Drug Release Behaviour of Diltiazem Hydrochloride Using Guar Gum and HPMC As a Polymer”. Journal of Drug Delivery and Therapeutics, vol. 16, no. 7, July 2026, pp. 155-60, https://doi.org/10.22270/jddt.v16i7.7896.