E. Kopciał, B. Polak, R. Pietraś, P. Mączka, and . T. H. Dzido, “Effect of mobile phase buffer ph on separation selectivity of some isoquinoline alkaloids in reversed-phase systems of Pressurized Planar Electrochromatography and High-Performance Thin-Layer Chromatography”, Curr. Issues Pharm. Med. Sci., vol. 26, no. 1, pp. 45–49, Mar. 2013, doi: 10.12923/j.2084-980X/26.1/a.09.