@article{10_4064_fm_81_3_261_265,
     author = {P. Erd\"os and A. Hajnal},
     title = {Some remarks on set theory {XI}},
     journal = {Fundamenta Mathematicae},
     pages = {261--265},
     publisher = {mathdoc},
     volume = {81},
     number = {3},
     year = {1973},
     doi = {10.4064/fm-81-3-261-265},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-81-3-261-265/}
}