1. Buckey JC Jr. Preparing for Mars: The physiologic and medical challenges. European Journal of Medical Research. 1999;4:353-356
2. Buckey JC Jr. Space Physiology. New York: Oxford University Press; 2006. pp. 1-283
3. Clément G. Fundamentals of Space Medicine. 2nd ed. New York: Springer; 2011. pp. 1-381
4. International Academy of Astronautics Study Group, editor. Bone standard measures. In: International Academy of Astronautics Study Group. In: Guidelines for Standardization of Bed Rest Studies in the Spaceflight Context. 2012a. pp. 44-46
5. International Academy of Astronautics Study Group. Guidelines for standardization of bed rest studies in the spaceflight context; 2012b