ZULKARNAIN, A. K.; JUMINA, J.; KHARISMAWATI, G. T.; LARASATI, F. A. Optimization of Gelling Agent and Sunscreen Activity Test of 4-OH-chalcone Gel by In Vitro Method. Indonesian Journal of Pharmacy, v. 34, n. 1, p. 112-119, 11 Jan. 2023.