@article{chang1981perfective,
  author = {Chang, Betty Shefts and Chang Kun},
  xn-author = {chang, betty shefts and chang kun},
  title = {Perfective and imperfective in spoken Tibetan},
  year = {1981},
  journal = {Academia Sinica/Bulletin of the Institute of History and Philology},
  xn-pub = {Academia Sinica/Bulletin of the Institute of History and Philology},
  volume = {52},
  pages = {303-21},
  keywords = {Tibetan: Gram},
  check = {chang:1981:perfective},
  source = {Huffman86-a-k},
}