Brysbaert and New 2009

Brysbaert, M. & B. New. 2009. Moving beyond Kucera and Francis: A critical evaluation of current word frequency norms and the introduction of a new and improved word frequency measure for American English. Behavior Research Methods 41. 977-990.

@article{Brysbaert2009,
  author  = {Brysbaert, M. and New, B.},
  journal = {Behavior Research Methods},
  pages   = {977-990},
  title   = {Moving beyond Kucera and Francis: A critical evaluation of current word frequency norms and the introduction of a new and improved word frequency measure for American English},
  volume  = {41},
  year    = {2009}
}