@article{MMO_1974_30_a3,
     author = {V. K. Bel'nov},
     title = {Some theorems on metric extensions},
     journal = {Trudy Moskovskogo matemati\v{c}eskogo ob\^{s}estva},
     pages = {115--137},
     publisher = {mathdoc},
     volume = {30},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MMO_1974_30_a3/}
}