TY  - JOUR
AU  - P. E. Ryabov
AU  - M. P. Kharlamov
TI  - Classification of  singularities in the problem of motion of the Kovalevskaya top in a~double force field
JO  - Sbornik. Mathematics
PY  - 2012
SP  - 257
EP  - 287
VL  - 203
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_2012_203_2_a5/
LA  - en
ID  - SM_2012_203_2_a5
ER  -