@article{PORMA_1972__31_2_115166,
     author = {Costley, Charles G.},
     title = {On sequence of additive set functions},
     journal = {Portugaliae mathematica},
     pages = {97--104},
     publisher = {mathdoc},
     volume = {31},
     number = {2},
     year = {1972},
     mrnumber = {0304599},
     zbl = {0239.28007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1972__31_2_115166/}
}