Coisotropic invariant tori of hamiltonian systems of the quasiclassical theory of motion of a conduction electron
English version (Springer): Ukrainian Mathematical Journal 42 (1990), no. 3, pp 308-312.
Citation Example: Parasyuk I. O. Coisotropic invariant tori of hamiltonian systems of the quasiclassical theory of motion of a conduction electron // Ukr. Mat. Zh. - 1990. - 42, № 3. - pp. 346-351.
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