@article{guy-97-covoy,
  author = {Jacques B. M. Guy},
  title = {The Distribution of Letters `c' and `o' in the {Voynich} {Manuscript}: {Evidence} for a Real Language?},
  journal = {Cryptologia},
  volume = {XXI},
  number = {1},
  pages = {51--54},
  year = 1997,
  month = jan
}