Semi-classical approximation in quantum mechanics/
V.P. Maslov and M.V. Fedoriuk ; translated from the Russian by J. Niederle and J. Tolar.
- Dordrecht, Holland ; Boston: D. Reidel, Sold and distributed in the U.S.A. and Canada by Kluwer Academic, c1981.
- ix, 301 p. ; 23 cm.
- Mathematical physics and applied mathematics. v. 7. .