垂直リズム

www.alistapart.com/articles/settingtypeontheweb

www.clagnut.com/blog/1942

www.jameswhittaker.com/blog/article/em-based-layouts-vertical-rhythm-calculator

meyerweb.com/eric/thoughts/2006/02/08/unitless-line-heights

topfunky.com/baseline-rhythm-calculator

www.markboulton.co.uk/journal/comments/incremental_leading