@article{10_21136_CPMF_1929_124031,
     author = {Pankraz, Otomar},
     title = {K didaktice politick\'e aritmetiky},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky a fysiky},
     pages = {49--D52},
     year = {1929},
     volume = {58},
     number = {3-4},
     doi = {10.21136/CPMF.1929.124031},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPMF.1929.124031/}
}