Geodesic
The Landau--Lifshitz formula and the correspondence principle for semiclassical matrix elements
Teoretičeskaâ i matematičeskaâ fizika, Tome 90 (1992) no. 2, pp. 218-225

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The semiclassical Landau–Lifshitz formula with pre-exponential factor is derived and its cormection with the correspondence principle is traced. Illustrations are given of its use for the Morse potential and the modified Peschl–Teller potential, and also for a very simple potential with first-order poles. 
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     author = {\`E. S. Medvedev},
     title = {The {Landau--Lifshitz} formula and the correspondence principle for semiclassical matrix elements},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {218--225},
     publisher = {mathdoc},
     volume = {90},
     number = {2},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1992_90_2_a5/}
}
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È. S. Medvedev. The Landau--Lifshitz formula and the correspondence principle for semiclassical matrix elements. Teoretičeskaâ i matematičeskaâ fizika, Tome 90 (1992) no. 2, pp. 218-225. http://geodesic.mathdoc.fr/item/TMF_1992_90_2_a5/