“Quantification of Methotrexate by Liquid Chromatography Ultraviolet Detection for Routine Monitoring of Plasma Levels: Quantification of Methotrexate”. Biological Sciences - PJSIR, vol. 52, no. 3, June 2009, pp. 154-7, https://www.v2.pjsir.org/index.php/biological-sciences/article/view/540.