@article{scalinglawsinhumanspeechdecreasing,
  title = {Scaling laws in human speech, decreasing emergence of new words and a generalized model},
  author = {Ruokuang Lin and Qianli D. Y. Ma and Chunhua Bian},
  year = {2014},
  eprint = {1412.4846},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1412.4846v2},
}