%0 Journal Article %A Rodney G. Downey %A Asher M. Kach %A Steffen Lempp %A Daniel D. Turetsky %T Computable categoricity versus relative computable categoricity %J Fundamenta Mathematicae %D 2013 %P 129-159 %V 221 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm221-2-2/ %R 10.4064/fm221-2-2 %G en %F 10_4064_fm221_2_2