@article{MZM_1984_35_6_a7,
     author = {Nguyen Le Anh},
     title = {Vietoris-Begle theorem},
     journal = {Matemati\v{c}eskie zametki},
     pages = {847--854},
     publisher = {mathdoc},
     volume = {35},
     number = {6},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1984_35_6_a7/}
}