@article{SM_1973_20_2_a5,
     author = {A. K. Tolpygo},
     title = {Universality of nonabelian cohomology},
     journal = {Sbornik. Mathematics},
     pages = {283--296},
     publisher = {mathdoc},
     volume = {20},
     number = {2},
     year = {1973},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1973_20_2_a5/}
}