I. REBANE. Study on Time-Dependent Absorption Theory of Three Light Pulses in a Ladder-Type Four-Level System. Newest Updates in Physical Science Research Vol. 9, [S. l.], p. 14–28, 2021. DOI: 10.9734/bpi/nupsr/v9/9837D. Disponível em: https://stm.bookpi.org/NUPSR-V9/article/view/1934. Acesso em: 13 jun. 2026.