@article{10_21136_CPMF_1950_122339,
     author = {Kat\v{e}tov, Miroslav},
     title = {Line\'arn{\'\i} oper\'atory. {[I.]}},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky a fysiky},
     pages = {9--D31},
     year = {1950},
     volume = {75},
     number = {1},
     doi = {10.21136/CPMF.1950.122339},
     mrnumber = {0038563},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPMF.1950.122339/}
}