@article{10_4064_fm_67_1_97_113,
     author = {Andrzej Szankowski},
     title = {Projective potencies and multiplicative extension operators},
     journal = {Fundamenta Mathematicae},
     pages = {97--113},
     publisher = {mathdoc},
     volume = {67},
     number = {1},
     year = {1970},
     doi = {10.4064/fm-67-1-97-113},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-67-1-97-113/}
}