%0 Journal Article %A I. L. Kantor %T Some problems in $\mathfrak{L}$-functor theory %J Matematičeskie trudy %D 1989 %P 54-75 %V 16 %I mathdoc %U http://geodesic.mathdoc.fr/item/MT_1989_16_a2/ %G ru %F MT_1989_16_a2