@article{CMJ_2007__57_2_a15,
     author = {de Simone, Anna and Pt\'ak, Pavel},
     title = {Group-valued measures on coarse-grained quantum logics},
     journal = {Czechoslovak Mathematical Journal},
     pages = {737--746},
     publisher = {mathdoc},
     volume = {57},
     number = {2},
     year = {2007},
     mrnumber = {2337627},
     zbl = {1174.03350},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2007__57_2_a15/}
}