_id,doi,title
12145,10.1134/S1560354722050021,On some invariants of Birkhoff billiards under conjugacy
8689,10.1134/S1560354721010044,V.I. Arnold's ''Global'' KAM theorem and geometric measure estimates
9435,,Non co-preservation of the 1/2 and  1/(2l+1)-rational caustics along deformations of circles
8691,10.1016/j.jde.2020.03.044,A KAM theorem for finitely differentiable Hamiltonian systems
8694,10.1063/5.0012822,Rigorous numerics for critical orbits in the quadratic family
8693,10.1134/S1560354719060017,"V. I. Arnold’s “pointwise” KAM theorem"