@article{VMUMM_1984_6_a5,
     author = {A. Ch. Chigogidze},
     title = {Extension of normal functors},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {23--26},
     year = {1984},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1984_6_a5/}
}