LINDSKOUG, B.; JOHANSSON, K. A. Collimator and Scattering Foil for 10–20 MeV Electrons. Acta Oncologica, [S. l.], v. 10, n. 1, p. 21–26, 1971. DOI: 10.3109/02841867109129742. Disponível em: https://medicaljournalssweden.se/actaoncologica/article/view/33916. Acesso em: 21 feb. 2025.