@article{LaPolla2015,
  author    = {Randy J. LaPolla},
  title     = {The phonetic development of tibetan : a problem set},
  journal   = {Linguistics of the Tibeto-Burman area},
  volume    = {11},
  number    = {2},
  pages     = {93 -- 97},
  url       = {http://www.ntu.edu.sg/home/randylapolla/papers/LaPolla_1988_Phonetic_development_of_Tibetan.pdf},
  year      = {2015},
}