@article{10_21136_CPM_1961_117366,
     author = {Kr\'al, Josef},
     title = {Pozn\'amka o povrchu kart\'ezsk\'eho sou\v{c}inu dvou mno\v{z}in},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky},
     pages = {261--268},
     publisher = {mathdoc},
     volume = {086},
     number = {3},
     year = {1961},
     doi = {10.21136/CPM.1961.117366},
     mrnumber = {0132157},
     zbl = {0105.27003},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1961.117366/}
}