Reference: Heath 1998

Heath, Jeffrey. 1998. Pragmatic skewing in 1 > 2 pronominal combinations in Native American languages. International Journal of American Linguistics 64. 83–104.

@article{heath1998pragmatic,
  author  = {Heath, Jeffrey},
  journal = {International Journal of American Linguistics},
  pages   = {83–104},
  title   = {Pragmatic skewing in 1 > 2 pronominal combinations in Native American languages},
  volume  = {64},
  year    = {1998}
}