@article{PORMA_1997__54_2_47862,
     author = {Zaharopol, Radu},
     title = {On the {Banach} principle.},
     journal = {Portugaliae mathematica},
     pages = {229--253},
     publisher = {mathdoc},
     volume = {54},
     number = {2},
     year = {1997},
     zbl = {0886.47006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1997__54_2_47862/}
}