@incollection{LaPolla2010,
  author    = {Randy J. LaPolla},
  title     = {On grammatical relations as constraints on referent identification},
  booktitle = {Voice and Grammatical Relations: Festschrift for Masayoshi Shibatani (Typological Studies in Language), ed. by Tasaku Tsunoda and Taro Kageyama},
  url       = {http://victoria.linguistlist.org/~lapolla//rjlapolla/papers/tsl6506.pdf},
  year      = {2010},
}