@article{VMUMM_1985_5_a2,
     author = {A. P. Kombarov},
     title = {Compactness and sequentiality with respect to a set of ultrafilters},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {15--18},
     publisher = {mathdoc},
     number = {5},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1985_5_a2/}
}