@article{10_21136_CPM_1961_108199,
     author = {\v{S}ik, Franti\v{s}ek},
     title = {O aditivn{\'\i}ch a isotonn{\'\i}ch funkcion\'alech na uspo\v{r}\'adan\'ych grup\'ach},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky},
     pages = {238--240},
     publisher = {mathdoc},
     volume = {086},
     number = {2},
     year = {1961},
     doi = {10.21136/CPM.1961.108199},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1961.108199/}
}