“Phytochemical Screening and In-Vitro Evaluation of Antioxidant Activities of Various Extracts of Leaves and Stems of Kalanchoe crenata ”, J. Pharm. Nutr. Sci., vol. 2, no. 1, pp. 104–114, Jan. 2012, doi: 10.6000/1927-5951.2012.02.01.14.