@article{IVM_1965_4_a18, author = {V. P. Filippov}, title = {Some theorems on non-separability of $B$-sets of lower classes}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {147--153}, publisher = {mathdoc}, number = {4}, year = {1965}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1965_4_a18/} }