Parvathy Gopan; Padma; KM Sweta; Dhyan Surendranath. A Randomised Controlled Clinical Study to Evaluate the Role of Nirvapana Upakrama With Durva Ointment in the Management of Pittaja Dushta Vrana With Special Reference to Fissure-in-Ano. J Ayurveda Integr Med Sci 2022, 7, 35 - 45.