@article{10_21136_CPMF_1940_121982,
     author = {Petr, Karel},
     title = {O racion\'aln\'em kanonick\'em tvaru line\'arn{\'\i} substituce},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky a fysiky},
     pages = {9--22},
     publisher = {mathdoc},
     volume = {69},
     number = {2},
     year = {1940},
     doi = {10.21136/CPMF.1940.121982},
     mrnumber = {0001203},
     zbl = {0023.00303},
     language = {cz},
     url = {https://geodesic-test.mathdoc.fr/articles/10.21136/CPMF.1940.121982/}
}