@article{10_4064_fm_52_2_205_207,
     author = {A. Fine},
     title = {Abstract covering theorems},
     journal = {Fundamenta Mathematicae},
     pages = {205--207},
     publisher = {mathdoc},
     volume = {52},
     number = {2},
     year = {1963},
     doi = {10.4064/fm-52-2-205-207},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-52-2-205-207/}
}