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@article{IVM_1960_4_a15, author = {A. P. Norden}, title = {On a~class of four-dimensional $A$-spaces}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {145--157}, publisher = {mathdoc}, number = {4}, year = {1960}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1960_4_a15/} }
A. P. Norden. On a~class of four-dimensional $A$-spaces. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 4 (1960), pp. 145-157. http://geodesic.mathdoc.fr/item/IVM_1960_4_a15/