Chakrapani Pullagummi, Bhaludra Chandra Sekhar Singh, Arun Jyothi Bheemagani, Sambashiva Daravath, and Prem Kumar, “Phytochemical analysis and antibacterial activity of Gymnema sylvestre leaf extracts”, ijp, vol. 6, no. 2, pp. 201–205, Jun. 2014.