@article{PORMA_1961__20_4_114866,
     author = {Saalfrank, C.W.},
     title = {Corrections to the article },
     journal = {Portugaliae mathematica},
     pages = {251--251},
     publisher = {mathdoc},
     volume = {20},
     number = {4},
     year = {1961},
     mrnumber = {0126830},
     zbl = {0099.17405},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1961__20_4_114866/}
}