@article{CMUC_1979__20_2_a8,
     author = {Rie\v{c}an, Beloslav},
     title = {The measure extension theorem for subadditive probability measures in orthomodular $\sigma$-continuous lattices},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {309--316},
     publisher = {mathdoc},
     volume = {20},
     number = {2},
     year = {1979},
     mrnumber = {539559},
     zbl = {0413.28006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1979__20_2_a8/}
}