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@article{AL_1986_25_5_a2, author = {Yu. L. Ershov}, title = {On $f_A$-spaces}, journal = {Algebra i logika}, pages = {533--543}, publisher = {mathdoc}, volume = {25}, number = {5}, year = {1986}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1986_25_5_a2/} }
Yu. L. Ershov. On $f_A$-spaces. Algebra i logika, Tome 25 (1986) no. 5, pp. 533-543. http://geodesic.mathdoc.fr/item/AL_1986_25_5_a2/