%0 Journal Article
%A Mitchell, J. M. O.
%T Counting word-trees
%J Glasgow mathematical journal
%D 1974
%P 148-149
%V 15
%N 2
%U http://geodesic.mathdoc.fr/articles/10.1017/S0017089500002317/
%R 10.1017/S0017089500002317
%F 10_1017_S0017089500002317