European semi-anthropomorphic spine phantom for the calibration of bone densitometers: Assessment of precision, stability and accuracy the European quantitation of osteoporosis study groupJohn Pearson, G. Wittenberg, J. Kalef-Ezras et al.|Osteoporosis International|1995Cited by 111
European semi-anthropomorphic phantom for the cross-calibration of peripheral bone densitometers: assessment of precision accuracy and stabilityJohn Pearson, P. Schneider, R.-D. Hesch et al.|Bone and Mineral|1994Cited by 50