@article{ZNSL_1979_92_a14,
     author = {N. A. Shirokov},
     title = {Approximative properties of a~continuum},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {241--252},
     publisher = {mathdoc},
     volume = {92},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1979_92_a14/}
}