@article{CMJ_2009__59_3_a11,
     author = {Barbieri, Giuseppina},
     title = {An extension theorem for modular measures on effect algebras},
     journal = {Czechoslovak Mathematical Journal},
     pages = {707--719},
     publisher = {mathdoc},
     volume = {59},
     number = {3},
     year = {2009},
     mrnumber = {2545651},
     zbl = {1224.28037},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2009__59_3_a11/}
}