[1] A New Front-End Methodology: BEM | Smashing Coding ( (2013-07-12 07:47:00 +09:00 版)) <http://coding.smashingmagazine.com/2012/04/16/a-new-front-end-methodology-bem/>

[2] Methodology / BEM ( (2017-02-02 21:32:35 +09:00)) <https://en.bem.info/methodology/>