Chaurasia, S., A. Diwaker, and N. Garg. “A Comparative Study of Collagen-Based Dressing Versus Conventional Dressing in Chronic Ulcers”. International Journal of Research in Medical Sciences, vol. 9, no. 8, July 2021, pp. 2289-95, doi:10.18203/2320-6012.ijrms20213072.