Hill, Nathan W. 2009. Tibetan <h> as a plain initial and its place in Old Tibetan phonology. Linguistics of the Tibeto Burman Area 32. 115–140.
@article{jacquesestimative-hill09plain, author = {Hill, Nathan W}, journal = {Linguistics of the Tibeto Burman Area}, number = {1}, pages = {115–140}, title = {Tibetan <h> as a plain initial and its place in Old Tibetan phonology}, volume = {32}, year = {2009} }