@article{DAN_1972_204_4_a3,
     author = {I. M. Kozlovskii},
     title = {Two theorems on metric spaces},
     journal = {Doklady Akademii Nauk},
     pages = {784--787},
     publisher = {mathdoc},
     volume = {204},
     number = {4},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1972_204_4_a3/}
}