Dharmakīrti relates in Pramāṇavārttika 4.27 his refutation of the view that the formulation of the thesis (pakṣa) is part of the proof, and in Pramāṇavārttika 4.122 his view that the reason in the inference acandraḥ śaśī sattvāt is uncommon (asādhāraṇa). Cf. Sastri 1946; Watanabe 渡辺 1976; Tillemans 1991. More in Iwata 1991 Appendix B.
Tillemans, Tom J. F. 1997. “Dharmakirti on Prasiddha and Yogyata.” In Aspects of Buddhism: Proceedings of the International Seminar on Buddhist Studies. Liw, 25 June 1994, edited by Agata Bareja-Starzynska and Marek Mejor, 161–76. Warsaw: Oriental Institute Warsaw University.
Tillemans, Tom J. F. 2000. Dharmakīrti’s Pramāṇavārttika: An Annotated Translation of the Fourth Chapter (Parārthānumāna). Wien: Verlag der Österreichischen Akademie der Wissenschaften.