“Phytochemical Screening, In-vitro Anti-oxidant Activity and Gas Chromatography–Mass spectrometry Analysis of Methanolic Extracts of Smilax perfoliata and Breynia retusa” (2022) International Journal of Pharmaceutical Sciences and Drug Research, 14(6), pp. 799–810. doi:10.25004/IJPSDR.2022.140618.