de Vries, F., Souverein, P. C., Cooper, C., Leufkens, H. G. M., & van Staa, T. P. (2007). Use of β-Blockers and the Risk of Hip/Femur Fracture in the United Kingdom and The Netherlands. Springer-Verlag.

de Vries, F., P. C. Souverein, C. Cooper, H. G. M. Leufkens, and T. P. van Staa. Use of β-Blockers and the Risk of Hip/Femur Fracture in the United Kingdom and The Netherlands. Springer-Verlag, 2007.

de Vries, F., et al. Use of β-Blockers and the Risk of Hip/Femur Fracture in the United Kingdom and The Netherlands. Springer-Verlag, 2007.