@article{zipfslawin50languagesitsstructural,
  title = {Zipf's law in 50 languages: its structural pattern, linguistic interpretation, and cognitive motivation},
  author = {Shuiyuan Yu and Chunshan Xu and Haitao Liu},
  year = {2018},
  eprint = {1807.01855},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1807.01855v1},
}