Ji L. Wang Ch., “Poincare'S Stated Motivations For Topology”, Arch. Hist. Exact Sci., 74:4 (2020), 381–400
А. Д. Брюно, “О типах устойчивости в системах Гамильтона”, Препринты ИПМ им. М. В. Келдыша, 2020, 021, 24 с.
Boris S. Bardin, Víctor Lanchares, “Stability of a One-degree-of-freedom Canonical System in the Case of Zero Quadratic and Cubic Part of a Hamiltonian”, Regul. Chaotic Dyn., 25:3 (2020), 237–249
B. S. Bardin, “On a Method of Introducing Local Coordinates in the Problem of the Orbital Stability of Planar Periodic Motions of a Rigid Body”, Rus. J. Nonlin. Dyn., 16:4 (2020), 581–594
A. P. Markeev, T. N. Chekhovskaya, “On Nonlinear Oscillations and Stability of Coupled Pendulums in the Case of a Multiple Resonance”, Rus. J. Nonlin. Dyn., 16:4 (2020), 607–623
M. V. Berry, Hamiltonian Dynamical Systems, 2020, 27
Alfred R. Osborne, “Nonlinear Fourier Analysis: Rogue Waves in Numerical Modeling and Data Analysis”, JMSE, 8:12 (2020), 1005
Sara Di Ruzza, Jérôme Daquin, Gabriella Pinzari, “Symbolic dynamics in a binary asteroid system”, Communications in Nonlinear Science and Numerical Simulation, 91 (2020), 105414
V. M. Fedorov, “Comments on J. J. Smulsky's Paper “A New Theory of the Earth Insolation Change over Millions of Years against Marine Isotope Stages””, Izv. Atmos. Ocean. Phys., 56:7 (2020), 748
Anurag, Basudeb Mondal, Jayanta K. Bhattacharjee, Sagar Chakraborty, “Understanding the order-chaos-order transition in the planar elastic pendulum”, Physica D: Nonlinear Phenomena, 402 (2020), 132256