REBANE, K. K. Purely electronic zero-phonon line as the foundation stone for high-resolution matrix spectroscopy, single-impurity-molecule spectroscopy, and persistent spectral hole burning. Recent developments: Spectroscopy in Cryocrystals and Matrices. ФІЗИКА НИЗЬКИХ ТЕМПЕРАТУР, Харків, Україна, v. 29, n. 9-10, p. 1101–1108, 2003. DOI: 10.1063/1.1619354. Disponível em: https://fnt.ilt.kharkov.ua/index.php/fnt/article/view/f29-1101e. Acesso em: 24 лис. 2024.