My previous favorite method to remove a hard to remove fixed up from a bottom bracket served me well. I used it to remove a bunch of fixed cups. But I finall
How to destructively remove a bottom bracket if you have exhausted
Removing (or Not) a Stuck T.A. Fixed Cup
An improvement on Sheldon's fixed cup removal tool - Arcady Genkin
Bottom bracket - Wikipedia
HCW-4 Crank and Bottom Bracket Wrench
How to destructively remove a bottom bracket if you have exhausted
bottom bracket wrenches tools vintage shimano campagnolo special
bottom bracket adjustable cup stuck - Bike Forums
Another very stuck bottom-bracket – non-standard size (37 mm flats
What tool to remove this bottom bracket? '92 Trek Multitrack 790
Removing a Very STUCK Bottom Bracket (Square Taper)
Seized Square-Taper Bottom Bracket Removal, the Knuckle-friendly
An improvement on Sheldon's fixed cup removal tool - Arcady Genkin
Bottom Brackets
自転車メンテナンスガイド - スープdeスパンク