@article{MAT_1960_4_6_a4, author = {A. P. Robertson and W. J. Robertson}, title = {On the closed graph theorem}, journal = {Matematika}, pages = {73--78}, publisher = {mathdoc}, volume = {4}, number = {6}, year = {1960}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MAT_1960_4_6_a4/} }