Gelfreich Vassili Georgievich

Publications in Math-Net.Ru

1. Separatrix Splitting at a Hamiltonian $0^2 i\omega$ Bifurcation
   
   Regul. Chaotic Dyn., 19:6 (2014),  635–655
2. Splitting of separatrices: perturbation theory and exponential smallness
   
   Uspekhi Mat. Nauk, 56:3(339) (2001),  79–142
3. Analitical Invariants of Conformal Transformations. A Dynamical System Approach
   
   Regul. Chaotic Dyn., 3:4 (1998),  40–48


4. Unique normal forms for area preserving maps near a fixed point with neutral multipliers
   
   Regul. Chaotic Dyn., 15:2-3 (2010),  300–318
5. Universal dynamics in a neighborhood of a generic elliptic periodic point
   
   Regul. Chaotic Dyn., 15:2-3 (2010),  159–164