@article{PORMA_1953__12_3_114716,
     author = {Pereira Coelho, R.},
     title = {Regularity types},
     journal = {Portugaliae mathematica},
     pages = {87--98},
     publisher = {mathdoc},
     volume = {12},
     number = {3},
     year = {1953},
     mrnumber = {0058959},
     zbl = {0051.39901},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1953__12_3_114716/}
}