Geodesic
Classical asymptotic behavior of the free Schr\"odinger equation for calculating corrections in the stationary phase method
Teoretičeskaâ i matematičeskaâ fizika, Tome 25 (1975) no. 2, pp. 270-274

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New formulae are obtained for the corrections to the asymptotics of the integral according to the stationary phase method. To this end the WKB approximation for the Schrödinger equation is used. The residual term for the asymptotical series over the small parameter powers representing the expansion of the integral of quickly oscillating functions, is obtained. 
@article{TMF_1975_25_2_a11,
     author = {Le Vu An'},
     title = {Classical asymptotic behavior of the free {Schr\"odinger} equation for calculating corrections in the stationary phase method},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {270--274},
     publisher = {mathdoc},
     volume = {25},
     number = {2},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1975_25_2_a11/}
}
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Le Vu An'. Classical asymptotic behavior of the free Schr\"odinger equation for calculating corrections in the stationary phase method. Teoretičeskaâ i matematičeskaâ fizika, Tome 25 (1975) no. 2, pp. 270-274. http://geodesic.mathdoc.fr/item/TMF_1975_25_2_a11/