Uniform asymptotics of the spectral function for perturbed harmonic oscillator and equiconvergence of series with respect to the eigenfunctions

Uniform asymptotics of the spectral function for perturbed harmonic oscillator and equiconvergence of series with respect to the eigenfunctions. (1992). Annual of Sofia University St. Kliment Ohridski. Faculty of Mathematics and Informatics, 83(1), 51-65. https://annual.uni-sofia.bg/index.php/fmi/article/view/485