Types of critical points of the Kowalevski gyrostat in double field
  The problem of motion of the Kowalevski type gyrostat in double force field is considered. According to the classification used in the theory of Liouville integrable Hamiltonian systems, the types of critical points of all ranks of the integral map are calculated. 
M. P. Kharlamov, P. E. Ryabov, A. Y. Savushkin, G. E. Smirnov
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