@article{10_4064_cm_2_1_20_26,
     author = {Roman Sikorski},
     title = {The integral in a {Boolean} algebra},
     journal = {Colloquium Mathematicum},
     pages = {20--26},
     publisher = {mathdoc},
     volume = {2},
     number = {1},
     year = {1949},
     doi = {10.4064/cm-2-1-20-26},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-2-1-20-26/}
}