“Formulation and Physical Stability Test of Peel-Off Gel Mask Ethanol Extract of Avocado Leaf (Persea americana Mill) with PVA-HPMC Matrix” (2019) JURNAL ILMU KESEHATAN BHAKTI SETYA MEDIKA, 4, pp. 14–28. doi:10.56727/bsm.v4i.68.