R.S. Guttalu, H. Flashner, “Periodic solutions of non-linear autonomous systems by approximate point mappings”, Journal of Sound and Vibration, 129:2 (1989), 291
Andrea Milani, “Emerging stability and chaos”, Nature, 338:6212 (1989), 207
C. Maffei, P. Negrini, M. Scalia, “Bifurcation from 2-dimensional to 3-dimensional invariant tori”, Annali di Matematica pura ed applicata, 155:1 (1989), 117
Chjan C. Lim, “On singular Hamiltonians: the existence of quasi-periodic solutions and nonlinear stability”, Bull. Amer. Math. Soc., 20:1 (1989), 35
Anna M. Nobili, Applications of Computer Technology to Dynamical Astronomy, 1989, 293
A Salat, “Non-KAM Hamiltonians”, Phys Scr, 38:1 (1988), 17
Javier Villarroel, “Stochasticity in Yang–Mills theory”, J Math Phys (N Y ), 29:9 (1988), 2132
А. Д. Брюно, “Нормальная форма системы Гамильтона”, УМН, 43:1(259) (1988), 23–56 ; A. D. Bruno, “The normal form of a Hamiltonian system”, Russian Math. Surveys, 43:1 (1988), 25–66
С. А. Ломов, А. Г. Елисеев, “Асимптотическое интегрирование сингулярно возмущенных задач”, УМН, 43:3(261) (1988), 3–53 ; S. A. Lomov, A. G. Eliseev, “Asymptotic integration of singularly perturbed problems”, Russian Math. Surveys, 43:3 (1988), 1–63
William C. Tittemore, Jack Wisdom, “Tidal evolution of the Uranian satellites”, Icarus, 74:2 (1988), 172