Restu, Witta Kartika, et al. “Formulation and Characteristics of Sunscreen Cream Based on Isolated Lignin from Oil Palm Empty Fruit Bunch (OPEFB) : Formulation and Characteristics of Sunscreen Cream ”. Jurnal Sains Materi Indonesia, vol. 26, no. 2, Apr. 2025, pp. 122-30, doi:10.55981/jsmi.2025.6199.