Michael Frigge and David C. Hoaglin and Boris Iglewicz.
Some Implementations of the Box Plot.
In The American Statistician, vol. 43, no. 1, pp. 50--54, 1989.

Bibtex:

@Article{        frigge:1989:SIBP,
  author = 	 "Michael Frigge and David C. Hoaglin and Boris Iglewicz",
  title = 	 "Some Implementations of the Box Plot",
  journal = 	 "The American Statistician",
  year = 	 "1989",
  volume = 	 "43",
  number = 	 "1",
  pages = 	 "50--54",
  month = 	 "February",
}