1. Ahmed, S.S., Levinson, G.E., Schwartz, C.J., and Ettinger, P.O. Systolic time intervals as measures of the contractile state of the left ventricular myocardium in man. Circulation, 46: 559, 1972.
2. Alam, M., and Smirk, F.H. Unilateral loss of blood pressure raising, pulse-accelerating reflex from voluntary muscle due to a lesion of the spinal cord. Clin. Sci. 3: 247–252, 1938.
3. Axen, K. Adaptations of quadriplegic men to consecutively loaded breaths. J. Appl. Physiol., Respir. Environ. Exercise Physiol. 56 (4): 1099–1103, 1984.
4. Bergofsky, E.H. Mechanism for respiratory insufficiency after cervical cord injury. A source of alveolar hypoventilation. Ann. Intern. Med. 61 (3): 435–447, 1964.
5. Brindley, G.S., Polkey, C.E., and Rushton, D.N. Electrical splinting of the knee in paraplegia. Paraplegia, 16: 428–435, 1978.