Joseph Hackin, Formulaire sanscrit-tibétain du Xe siécle, Libraire Orientaliste Paul Guethner (Paris 1924). Extracts translated in forthcoming book by Matthew Kapstein. Pelliot tibétain, no. 849. I think 'Bro Dkon mchog dpal is author only of the brief (and possibly unrelated) appended text at the end, which might possibly be identified as being a brief biography of Buddhagupta.
