E. KARADZHOV, G. Uniform asymptotics of the spectral function for perturbed harmonic oscillator and equiconvergence of series with respect to the eigenfunctions. Ann. Sofia Univ. Fac. Math. and Inf., [S. l.], v. 83, n. 1, p. 51–65, 1992. Disponível em: https://annual.uni-sofia.bg/index.php/fmi/article/view/485. Acesso em: 22 nov. 2024.