%0 Journal Article %A James Schmerl %T A decidable $ℵ_0$-categorical theory with a non-recursive Ryll-Nardzewski function %J Fundamenta Mathematicae %D 1978 %P 121-125 %V 98 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-98-2-121-125/ %R 10.4064/fm-98-2-121-125 %G en %F 10_4064_fm_98_2_121_125