2013-10-24 「箱ひげ図諸態」 情 Robert McGill, John W. Tukey, Wayne A. Larsen. 1978. Variations of Box Plots. The American Statistician, Vol. 32, No. 1. (1978), pp. 12-16. [pdf] Hadley Wickham and Lisa Stryjewski 2011. 40 years of boxplots. [pdf]