%0 Journal Article
%A P. E. Ryabov
%A M. P. Kharlamov
%T Classification of  singularities in the problem of motion of the Kovalevskaya top in a~double force field
%J Sbornik. Mathematics
%D 2012
%P 257-287
%V 203
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_2012_203_2_a5/
%G en
%F SM_2012_203_2_a5