LAX, I.; BRAHME, A. Collimation of High Energy Electron Beams. Acta Oncologica, [S. l.], v. 19, n. 3, p. 199–207, 1980. DOI: 10.3109/02841868009130153. Disponível em: https://medicaljournalssweden.se/actaoncologica/article/view/32992. Acesso em: 19 may. 2026.