@article{10_4064_fm_58_3_241_258,
     author = {Erik Ellentuck},
     title = {Generalized idempotence in cardinal arithmetic},
     journal = {Fundamenta Mathematicae},
     pages = {241--258},
     publisher = {mathdoc},
     volume = {58},
     number = {3},
     year = {1966},
     doi = {10.4064/fm-58-3-241-258},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-58-3-241-258/}
}