BM98Data_format_specification.html = http://www.sun-inet.or.jp/~yaneurao/bm98/bmsformat.html
BM98FinalSecret.html = http://www.sun-inet.or.jp/~yaneurao/bm98/bm98secret.html (Japanese)
tmp.txt = http://unhappyangel.at.infoseek.co.jp/bms/tmp.txt
BMS_Reading_Tutorial.txt = http://www.angelfire.com/ga4/jackatrades606606/BMS_Reading_Tutorial.txt

[BMS Dialects]
Drum BMS: http://wiki.bms.ms/Drum_BMS:Spec (Japanese)
DDR BMS
 * http://wiki.bms.ms/DDR_BMS:Spec (Japanese)
 * http://www.mni.ne.jp/~asuma/dde/explain.html (Japanese)
 * http://homepage1.nifty.com/nickle/ex_format.html (Japanese)

[not in repository but good reading]
http://fileformats.wikia.com/wiki/Be-Music_Script
http://nvyu.net/rdm/rby_ex.php (warning: Korean language material)
http://wiki.bms.ms/Bms:Spec
http://wiki.bms.ms/index.php?title=Bms:Format&oldid=1615 (last good revision)