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3. V. P. Maslov, Perturbation Theory and Asymptotical Methods (Izd.Moskov. Univ., Moscow, 1965; Dunod, Paris, 1972) [in Russian and French].
4. V. P. Maslov and T. V. Maslova, “Wiener Quantization of Economics as an Analog of the Quantization of Thermodynamics,” Math. Notes, 91(1) 81–89, 2012.