%0 Journal Article %A E. Lopez-Escobar %T On defining well-orderings %J Fundamenta Mathematicae %D 1966 %P 13-21 %V 59 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-59-1-13-21/ %R 10.4064/fm-59-1-13-21 %G en %F 10_4064_fm_59_1_13_21