@misc{7513,
  author = {Brown, Cecil H. and Wichmann, Søren},
  title  = {Proto-Mayan syllable nuclei. International Journal of American Linguistics 70(2). 128-186; Wichmann, Søren and Cecil H. Brown. n.y. Panchronic Mayan dictionary (unpublished electronic database).},
  year   = {2004}
}