@misc{10_21136_CPM_1970_108332, title = {\'Ulohy a probl\'emy}, journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky}, pages = {428}, publisher = {mathdoc}, volume = {095}, number = {4}, year = {1970}, doi = {10.21136/CPM.1970.108332}, language = {cs}, url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1970.108332/} }