%0 Journal Article
%A Alexandra Fronville
%A Anton P.  Sadovski
%A Henryk Żołądek
%T Solution of the $1 : {−}2$ resonant center problem in the quadratic case
%J Fundamenta Mathematicae
%D 1998
%P 191-207
%V 157
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/fm-157-2-3-191-207/
%R 10.4064/fm-157-2-3-191-207
%G en
%F 10_4064_fm_157_2_3_191_207