@article{GDZPPN002218208, title = {A Theorem of the Closed Graph Type.}, journal = {Manuscripta mathematica}, volume = {12}, year = {1974}, pages = {109-130}, zbl = {0286.46008}, url = {http://dml.mathdoc.fr/item/GDZPPN002218208} }
Pták, Vlastimil. A Theorem of the Closed Graph Type.. Manuscripta mathematica, Tome 12 (1974) pp. 109-130. http://gdmltest.u-ga.fr/item/GDZPPN002218208/