BENTKUS, R. On the asymptotic normality of the estimate of the spectral function. Lithuanian Mathematical Journal, [S. l.], v. 12, n. 3, p. 5–18, 1972. DOI: 10.15388/LMJ.1972.21124. Disponível em: https://journals.vu.lt./LMJ/article/view/21124. Acesso em: 26 apr. 2025.