@misc{MZM_1967_2_5_a0,
     title = {Historical note},
     journal = {Matemati\v{c}eskie zametki},
     pages = {437--438},
     year = {1967},
     volume = {2},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1967_2_5_a0/}
}