@article{IVM_1958_6_a23,
     author = {S. N. Slugin},
     title = {Some applications of methods of two-sided approximation},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {244--256},
     publisher = {mathdoc},
     number = {6},
     year = {1958},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1958_6_a23/}
}