Bui, Xuân Thanh, Thi Kim Thuong Nguyen, Thi Huyen Doan, Si Hung Le, and Thi Thao Ta. “FTIR Combined With Chemometrics for Fast Simultaneous Determination of Penicillin and Cephalexin in Pharmaceutical Tablets”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 36, no. 6 (November 15, 2017): 87–94. Accessed May 6, 2024. https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/8350.