R. C. Pradhan. “Nirvana in Candrakirti’s Prasannapada: A Study in the Madhyamika Concept of Nirvana in the Context of Indlian Thought”. Journal of Dharma, vol. 32, no. 4, Dec. 2007, pp. 407-10, https://dvkjournals.in/index.php/jd/article/view/896.