1. 1.��� Kosiak M. Etiology of and pathology of ischemic ulcers. Arch Phys Med Rehabil 1959; 40: 62���9.
2. 2.��� Kosiak M. Etiology of decubitus ulcers. Arch Phys Med Rehabil 1961; 42: 19���29.
3. 3.��� Dinsdale SM. Decubitus ulcers: role of pressure and friction in causation. Arch Phys Med Rehabil 1974; 55: 147���52.
4. 4.��� Reichel SM. Shearing force as factor in decubitus ulcers in paraplegics. JAMA 1958; 166: 762���3.
5. 5.��� Bennett L , Kavner D , Lee BK , Trainor FA. Shear vs. pressure as causative factors in skin blood flow occlusion. Arch Phys Med Rehabil 1979; 60: 309���14.