@article{VMUMM_1986_2_a18,
     author = {I. P. Patsei},
     title = {The $\sigma$ -product of strong $\Sigma$#-spaces},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {87--89},
     year = {1986},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1986_2_a18/}
}