Indrekvam, Kari, Inger Vikøyr, Rolf Terje Lie, Lars B. Engesæter, and Norvald Langeland. 1991. “Age-Related Differences in Chemical Composition of Rat Femur As Determinants for Strain”. Acta Orthopaedica 62 (5):455-58. https://doi.org/10.3109/17453679108996643.