390 citations to https://www.mathnet.ru/rus/faa2802
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Stephen C. Creagh, Jonathan M. Robbins, Robert G. Littlejohn, “Geometrical properties of Maslov indices in the semiclassical trace formula for the density of states”, Phys. Rev. A, 42:4 (1990), 1907
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В. А. Якубович, “Линейно-квадратичная задача оптимизации и частотная теорема для периодических систем. II”, Сиб. матем. журн., 31:6 (1990), 176–191 ; V. A. Yakubovich, “A linear-quadratic problem of optimization and the frequency theorem for periodic systems. II”, Siberian Math. J., 31:6 (1990), 1027–1039
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A Knauf, “Closed orbits and converse KAM theory”, Nonlinearity, 3:3 (1990), 961
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Marie-Paule Muller, “Une structure symplectique sur ℝ6 avec une sphère lagrangienne plongée et un champ de Liouville completavec une sphère lagrangienne plongée et un champ de Liouville complet”, Commentarii Mathematici Helvetici, 65:1 (1990), 623
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В. Ю. Овсиенко, “Самосопряженные дифференциальные операторы и кривые на лагранжевом грассманиане, подчиненные шлейфу”, Матем. заметки, 47:3 (1990), 65–73 ; V. Yu. Ovsienko, “Self-adjoint differential operators and curves on a Lagrangian Grassmannian, subject to a train”, Math. Notes, 47:3 (1990), 270–275
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R. Bl�mel, C. Hillermeier, U. Smilansky, “Classical and quantum dynamical regimes in the bound space projected dynamics of strongly driven H Rydberg atoms”, Z Phys D - Atoms, Molecules and Clusters, 15:4 (1990), 267
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Д. Беннекен, “Зацепления и уравнения Пфаффа”, УМН, 44:3(267) (1989), 3–53 ; D. Bennequin, “Linkings and Pfaff's equations”, Russian Math. Surveys, 44:3 (1989), 1–65
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M. L. Bialy, L. V. Polterovich, “Lagrangian singularities of invariant tori of hamiltonian systems with two degrees of freedom”, Invent Math, 97:2 (1989), 291
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Michael R. Herman, “Inégalités « a priori » pour des tores lagrangiens invariants par des difféomorphismes symplectiques”, Publications Mathématiques de L'Institut des Hautes Scientifiques, 70:1 (1989), 47
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M. Hazewinkel, Encyclopaedia of Mathematics, 1989, 1