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@article{DAN_1978_239_4_a5, author = {A. P. Kombarov}, title = {On tightness and normality of $\Sigma$-products}, journal = {Doklady Akademii Nauk}, pages = {775--778}, publisher = {mathdoc}, volume = {239}, number = {4}, year = {1978}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1978_239_4_a5/} }
A. P. Kombarov. On tightness and normality of $\Sigma$-products. Doklady Akademii Nauk, Tome 239 (1978) no. 4, pp. 775-778. http://geodesic.mathdoc.fr/item/DAN_1978_239_4_a5/