@article{DAN_1976_227_4_a8,
     author = {G. E. Mints},
     title = {The universality of the canonical tree},
     journal = {Doklady Akademii Nauk},
     pages = {808--811},
     year = {1976},
     volume = {227},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1976_227_4_a8/}
}