@article{MV_1967_19_4_a11,
     author = {L. A. Skornakov},
     title = {Gomologi\v{c}eskaya klassifikaciya kolec},
     journal = {Matemati\v{c}ki vesnik},
     pages = {415 },
     year = {1967},
     volume = {19},
     number = {4},
     url = {http://geodesic.mathdoc.fr/item/MV_1967_19_4_a11/}
}