PORTER, Samuel. Shelving Spectroscopy and Atomic Clock Development of the Strontium 689 nm Intercombination Line. University of Colorado Honors Journal, [S. l.], 2024. DOI: 10.33011/cuhj20242293. Disponível em: https://livecomsjournal.org/index.php/honorsjournal/article/view/2293. Acesso em: 26 apr. 2026.