@article{MAT_1962_6_3_a6,
     author = {V. Pt\'ak},
     title = {The principle of uniform boundedness and the closed graph theorem},
     journal = {Matematika},
     pages = {133--138},
     publisher = {mathdoc},
     volume = {6},
     number = {3},
     year = {1962},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MAT_1962_6_3_a6/}
}