ROOS, B. O.; SKÖLDBORN, H. Dual Photon Absorptiometky in Lumbar Vertebrae: I. Theory and Method. Acta Oncologica, [S. l.], v. 13, n. 3, p. 266–280, 1974. DOI: 10.3109/02841867409129883. Disponível em: https://medicaljournalssweden.se/actaoncologica/article/view/34167. Acesso em: 21 may. 2026.