Yen, Tran Thi Hai, Le Thu Huong, Nguyen Thi Thanh Duyen, & Vu Thi Thu Giang. " Preparation and SPF Evaluation of Sunscreen Cream Containing Titanium Dioxide." VNU Journal of Science: Medical and Pharmaceutical Sciences [Online], 35.1 (2019): n. pag. Web. 23 Nov. 2024