@article{10_4064_fm_109_2_155_161,
     author = {Adam Krawczyk and Andrzej Pelc},
     title = {On families of \ensuremath{\sigma}-complete ideals},
     journal = {Fundamenta Mathematicae},
     pages = {155--161},
     publisher = {mathdoc},
     volume = {109},
     number = {2},
     year = {1980},
     doi = {10.4064/fm-109-2-155-161},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-109-2-155-161/}
}