@article{10_21136_CPM_1983_118163,
     author = {Navara, Mirko and Pt\'ak, Pavel},
     title = {Two-valued measures on $\sigma $-classes},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky},
     pages = {225--229},
     year = {1983},
     volume = {108},
     number = {3},
     doi = {10.21136/CPM.1983.118163},
     mrnumber = {716405},
     zbl = {0526.28001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1983.118163/}
}