Metta, Vipul, Prabhat B. Nichkaode, Sunil V. Panchbhai, Sai Charan, and Aishwarya Purohit. “Clinical Study of Sterile Collagen (Biofil) Particles in the Management of Chronic Non Healing Ulcers and Their Comparison With Saline Dressings”. International Surgery Journal 7, no. 4 (March 26, 2020): 1148–1152. Accessed November 10, 2025. https://www.ijsurgery.com/index.php/isj/article/view/5489.