@article{10_4064_fm_70_2_205_220,
     author = {Artur Rubin and Jean Rubin},
     title = {Accumulation functions on the ordinals},
     journal = {Fundamenta Mathematicae},
     pages = {205--220},
     publisher = {mathdoc},
     volume = {70},
     number = {2},
     year = {1971},
     doi = {10.4064/fm-70-2-205-220},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-70-2-205-220/}
}