Effect of aging on the toughness of human cortical bone: evaluation by R-curves, 
Nalla, R. K., Kruzic J. J., Kinney J. H., and Ritchie R. O. 
, Bone, Dec, Volume 35, Number 6, p.1240-1246, (2004)
 Mechanistic aspects of fracture of human cortical bone, 
Nalla, R. K., Kruzic J. J., Kinney J. H., and Ritchie R. O. 
, Biological and Bio-Inspired Materials and Devices, MRS Symposium Proceedings, Volume 823, p.W8–2, (2004)