B S Bardin, “Local coordinates in problem of the orbital stability of pendulum-like oscillations of a heavy rigid body in the Bobylev–Steklov case”, J. Phys.: Conf. Ser., 1925:1 (2021), 012016
A. P. Markeev, “On the Stability of Lagrange Solutions in the Spatial Near-Circular Restricted Three-Body Problem”, Mech. Solids, 56:8 (2021), 1541
Alexander D. Bruno, Alexander B. Batkhin, “Survey of Eight Modern Methods of Hamiltonian Mechanics”, Axioms, 10:4 (2021), 293
Anurag, Basudeb Mondal, Tirth Shah, Sagar Chakraborty, “Chaos and order in librating quantum planar elastic pendulum”, Nonlinear Dyn, 103:3 (2021), 2841
Susheelkumar C. Subramanian, Sangram Redkar, “Lyapunov–Perron Transformation for Quasi-Periodic Systems and Its Applications”, Journal of Vibration and Acoustics, 143:4 (2021)
Arni S. R. Srinivasa Rao, Steven G. Krantz, “Dynamical Systems: From Classical Mechanics and Astronomy to Modern Methods”, J Indian Inst Sci, 101:3 (2021), 419
Rafael de la Llave, Lu Xu, “Whiskered Tori for Presymplectic Dynamical Systems”, J Dyn Diff Equat, 33:1 (2021), 1
Н. В. Мартемьянова, “Обратная задача для уравнения Лаврентьева–Бицадзе по определению сомножителей правой части”, Изв. вузов. Матем., 2020, № 1, 46–63 ; N. V. Martemyanova, “Nonlocal inverse problem to find unknown multipliers in right part of Lavrentev–Bitsadze equation”, Russian Math. (Iz. VUZ), 64:1 (2020), 40–57
Chjan C. Lim, “General Jacobi Coordinates and Herman Resonance for Some Nonheliocentric Celestial $N$-body Problems”, Regul. Chaotic Dyn., 25:2 (2020), 149–165
Ji L. Wang Ch., “Poincare'S Stated Motivations For Topology”, Arch. Hist. Exact Sci., 74:4 (2020), 381–400