@article{PORMA_1964__23_4_114932,
     author = {Topping, D.},
     title = {Vector lattices, {Boolean} rings and simple functions},
     journal = {Portugaliae mathematica},
     pages = {199--204},
     publisher = {mathdoc},
     volume = {23},
     number = {4},
     year = {1964},
     mrnumber = {0187069},
     zbl = {0137.31302},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1964__23_4_114932/}
}