@article{VMUMM_1988_2_a18,
     author = {I. A. Savchenko},
     title = {Convergence with respect to ultrafilters and the collectionwise normality of products},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {73--76},
     publisher = {mathdoc},
     number = {2},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1988_2_a18/}
}