1. V. P. Maslov, Perturbation Theory and Asymptotic Methods [in Russian], Moscow State Univ., Moscow (1965).
2. V. P. Maslov and M. V. Fedorjuk, Semiclassical Approximation for Equations of Quantum Mechanics [in Russian], Nauka, Moscow (1976); English transl.: Semiclassical Approximation in Quantum Mechanics, (Math. Phys. Appl. Math., Vol. 7), D. Reidel, Dordrecht (1981).
3. A. Mishchenko, V. Shatalov, and B. Sternin, Lagrangian Manifolds and the Method of Maslov’s Canonical Operator [in Russian], Nauka, Moscow (1978); English transl.: Lagrangian Manifolds and the Maslov Operator, Springer, Berlin (1990).
4. V. P. Maslov, Operator Methods [in Russian], Nauka, Moscow (1973); English transl.: Operational Methods, Mir, Moscow (1976).
5. V. P. Maslov and V. E. Nazaikinskii, J. Soviet Math., 15, 167–273 (1981).