2 Jun
1993
2 Jun
'93
10:39 a.m.
... what Barry Mitchell (old work! -- dare one say classical category theory?) called "algebroids". I don't know the reference ...
?? "Rings with several objects", Advances in Mathematics 8 (72) 1-161 Steve Vickers. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++