@article{10_4064_fm_115_3_195_205,
     author = {Alexander H\"aussler},
     title = {Defining cardinal addition by \ensuremath{\leq}-formulas},
     journal = {Fundamenta Mathematicae},
     pages = {195--205},
     publisher = {mathdoc},
     volume = {115},
     number = {3},
     year = {1983},
     doi = {10.4064/fm-115-3-195-205},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-115-3-195-205/}
}