1. Lumbar instability;Grieve;Physiotherapy,1982
2. Segmental instability;Frymoyer,1985
3. The morphology of the lumbar erector spinae;Macintosh;Spine,1987
4. Postural biomechanical stability and gross muscular architecture in the spine;Crisco,1990
5. The effect of an abdominal muscle training program on the intra-abdominal pressure;Cresswell;Scand J Rehabil Med,1993