@article{VMUMM_1988_1_a25,
     author = {V. M. Manuilov},
     title = {Natural homomorphisms in homology},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {89--91},
     year = {1988},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1988_1_a25/}
}