“Effect of Hydroxypropyl Methylcellulose Concentration Variations As a Gelling Agent on the Physical Quality of Hydrogel Formulations Containing Ethanol Extract of Impatiens Balsamina L. Herb”. Indonesian Journal of Medicine, vol. 10, no. 4, Oct. 2025, pp. 267-7, https://doi.org/10.26911/theijmed.2025.10.4.872.