%0 Journal Article
%A S. Jaśkowski
%T Undecidability of first order sentences in the theory of free groupoids
%J Fundamenta Mathematicae
%D 1956
%P 36-45
%V 43
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/fm-43-1-36-45/
%R 10.4064/fm-43-1-36-45
%G en
%F 10_4064_fm_43_1_36_45