@article{PORMA_1964__23_2_114923,
     author = {Davis, Harvey S. and Swingle, Paul M.},
     title = {Extended topologies and iteration and recursion of set-functions},
     journal = {Portugaliae mathematica},
     pages = {103--129},
     publisher = {mathdoc},
     volume = {23},
     number = {2},
     year = {1964},
     mrnumber = {0222827},
     zbl = {0134.18301},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1964__23_2_114923/}
}