“ Analysis of Chlorpheniramine in Human Urine Samples Using Dispersive Liquid-Liquid Microextraction Combined With High-Performance Liquid Chromatography ”. Brazilian Journal of Pharmaceutical Sciences 50, no. 3 (September 1, 2014): 551–557. Accessed June 2, 2024. https://periodicos.usp.br/bjps/article/view/87943.