Aka Pa tshab Lo tsā ba. 1055 is the birthdate usually given for him, although this may be too early (?).
Georges Dreyfus, A Tibetan Skeptic? A Preliminary Analysis of Patsab's Prāsaṅgika Philosophy, a paper given at the IABS in Atlanta in 2008.
Karen Lang, sPa tshab nyi ma grags and the Introduction of Prāsaṅgika Madhyamaka into Tibet, contained in: G. Kuppuram & K. Kumudamani, eds., Buddhist Heritage in India and Abroad, Sundeep Prakashan (Delhi 1992), pp. 267-281. Since the title is identical, this may be a second publishing of her 1989 article.
Dungkar Rinpoche's dictionary, pp. 1255-1256. Here his birthdate is given as 1055.
