%0 Journal Article
%A A. Schinzel
%T Solution to a Problem of
  Lubelski and an Improvement of a Theorem of His
%J Bulletin of the Polish Academy of Sciences. Mathematics
%D 2011
%P 115-119
%V 59
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/ba59-2-2/
%R 10.4064/ba59-2-2
%G en
%F 10_4064_ba59_2_2