English discussion of rigs thigs brjed byang
Kuijp, Leonard W. J. van der. 1989. An Introduction to Gtsang-Nag-Pa’s Tshad-Ma Rnam Par Nges-Pa'i Ṭi-Ka Legs-Bshad Bsdus-Pa. An Ancient Commentary on Dharmakīrti's Pramāṇaviniścaya. Otani University Collection No. 13971. Kyoto: Rinsen Book Co.