SØRENSEN, N. E.; SELL, A. Immobilisation, Compensation and Field Shaping in Megavolt Therapy. Acta Oncologica, [S. l.], v. 11, n. 2, p. 129–134, 1972. DOI: 10.3109/02841867209130769. Disponível em: https://medicaljournalssweden.se/actaoncologica/article/view/34615. Acesso em: 17 may. 2026.