%0 Journal Article %A A. I. Generalov %T Algebraic Mayer--Vietoris theorem over preabelian categories %J Zapiski Nauchnykh Seminarov POMI %D 2020 %P 61-68 %V 492 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_2020_492_a4/ %G ru %F ZNSL_2020_492_a4