1. Jacobson B. X-ray spectrophotometryin vivo.Am J Roentgen. 91:202–210; 1964.
2. Gustafsson L, Jacobson B, Kusoffsky L. X-ray spectrophotometry for bone-mineral determinations.Med and Biol Engin 12:113–118; 1974.
3. Reiss KH, Killig K, Schuster W. Dual photon x-ray beam applications. In:International Conference on Bone Mineral Measurement. RB Mazess (ed), Chicago, Il, Oct. 12–13, 1973, pp. 80–87.
4. Pacifici R, Rupich R, Vered I, Fischer KC, Griffin M, Susman N, Avioli LV. Dual energy radiography (DER): A preliminary comparative study.Calcif Tissue Int 43:189–191; 1988.
5. Wahner HW, Dunn ML, Brown ML, Hauser MF, Morin R. Comparison of Quantitative digital radiography (QDR) and dual-photon absorptiometry (DPA) for bone mineral measurements of the L-spine. In:Bone Mineral Measurement by Photon Absorptiometry., J Dequeker, P Geusens, H Wahner (ed), Leuven University Press, pp 419–426, 1988.