1. Gordon EE, Vanderwalde H . Energy requirements in paraplegic ambulation. Arch Phys Med Rehabil 1956; 37: 276–285.
2. Chantraine A, Crielaard JM, Onkelinx A, Pirnay F . Energy expenditure of ambulation in paraplegics: effects of long term use of bracing. Paraplegia 1984; 22: 173–181.
3. Nene AV, Patrick JH . Energy cost of paraplegic locomotion with the ORLAU parawalker. Spinal Cord 1989; 27: 5–18.
4. Bernardi M, Canale I, Castellano V, Di Filippo L, Felici F, Marchetti M . The efficiency of walking of paraplegic patients using a reciprocating gait orthosis. Paraplegia 1995; 33: 409–415.
5. Hirokawa S, Grimm M, Le T, Solomonow M, Baratta RV, D'Ambrosia RD . Energy consumption in paraplegic ambulation using the reciprocating gait orthosis and electric stimulation on the thigh muscles. Arch Phys Med Rehabil 1990; 71: 687–694.