1. 1. Knowlton GC Bennett RL. Overwork. Arch Ph\s MedRehabil. 1957; 38:18-20.
2. 2. Bennett RL Knowtton QC. Overwork weakness in partially denervated skeletal muscle. Clin Onhop. 1958; 12:22-49.
3. 3. Perry J Barnes G Gronely JK. The post-polio syndrome: an overuse phenomenon. ClIn Oriltop. 1989; 33:145-162.
4. 4. Dean E Ross J. Modified walking program: effect on patients with postpolio syndrome symptoms. Arch Phys Med Kehabil. 1988; 69; 1033-1038.
5. 5. Waters RL Hislop HJ Perry J et al. Energetics: application to the study and management of locomotor disorders. Onhap Clin North Am 1978; 9:351-362.