1. V. P. Maslov, Operational Methods (Nauka, Moscow, 1973; Mir, Moscow, 1976).
2. V. P. Maslov, “Nonstandard Characteristics in Asymptotic Problems,” Uspekhi Mat. Nauk 38 6 (234), 3–36 (1983); Russian Math. Surveys 38 (6), 1–42 (1983).
3. V. G. Danilov and P. N. Zhevandrov, “On Maslov’s Method for Constructing Combined Asymptotics for h-Pseudodifferential Equations,” Izv. Akad. Nauk SSSR. Ser. Mat. 53 (2), 411–424 (1989); Math. USSR-Izv. 34 (2), 425–439 (1990).
4. S. Yu. Dobrokhotov, A. I. Shafarevich, and B. Tirozzi, “Representations of Rapidly Decaying Functions by the Maslov Canonical Operator,” Math. Notes 82 (5), 713–717 (2007).
5. S. Yu. Dobrokhotov, A. I. Shafarevich, and B. Tirozzi, “Localized Wave and Vortical Solutions to Linear Hyperbolic Systems and Their Application to Linear Shallow-Water Equations,” Russ. J. Math. Phys. 15 (2), 192–221 (2008).