%0 Journal Article
%A O. E. Orel
%T Rotation function for integrable problems reducing to the~Abel equations. Orbital classification of Goryachev--Chaplygin systems.
%J Sbornik. Mathematics
%D 1995
%P 271-296
%V 186
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1995_186_2_a6/
%G en
%F SM_1995_186_2_a6