Bergström, J, and C. O. Henrikson. “Quantitative Long-Term Determinations of the Alveolar Bone Mineral Mass in Man by I Absorptiometry II. Following Periodontal Surgery”. Acta Oncologica, vol. 13, no. 6, Jan. 1974, pp. 489-00, doi:10.3109/02841867409132648.