PATRAMURTI, C., MARTONO, S., SUGIYANTO, S., & NURROCHMAD, A. 2014 Apr 30. Optimized Method of High Performance Liquid Chromatography using Octyl Silica Fully Endcapped Residual Silanol Column on Separation of Cotinine and 3-Hydroxycotinine in Urine Sample. JURNAL ILMU KEFARMASIAN INDONESIA. [Online] 12:1