Here is a list of his major publications:
* Contributions to the Study of Bactrian Documents from Northern Afghanistan: I: The Buddhist Fragments (1985).
* The Bactrian Documents from Northern Afghanistan: II. Inscriptions Handwritten on Leather (1995).
* The Eastern Iranian Languages (2004) (with Nicholas Sims-Williams).
* Old Iranian Dialects: Proceedings of the Fourth and Fifth Workshops of the International Society for Iranian Dialectology, Warsaw 2007 and Bucharest 2011 (2015) (with Martin Hinterberger).
* The Sayings of the Buddha: Translation and Commentary (2017) (with John T. Hinnells and Martin Southwold).
* Bactrian and Old Persian Texts: Texts and Translations from Eastern Asia and Central Asia (2018) (with Prods Oktor Skjærvø).