%0 Journal Article
%A Emmanuel Preissmann
%T On the length of the period of ...d.
%J Forum mathematicum
%D 1994
%P 137-138
%V 6
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/FORUM_1994__6_3_141729/
%F FORUM_1994__6_3_141729