%0 Journal Article %A Jonathan Kirby %T The rational field is not universally definable in pseudo-exponentiation %J Fundamenta Mathematicae %D 2016 %P 79-88 %V 232 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm232-1-6/ %R 10.4064/fm232-1-6 %G en %F 10_4064_fm232_1_6