Joel James, Arun Kumar Thaliyil Veettil, Kumar Pratyush, Chandra Shekhar Misra, Lipin Dev Mundur Sahadevan, and Thankamani V, “In Vitro Antioxidant Activity of Flowers and Fruits of Alstonia scholaris”, ijp, vol. 3, no. 4, pp. 475–479, Dec. 2011.