1. Standards for Neurological Classification of Spinal Injury Patients;American Spinal Injury Association,1984
2. Standards for Neurological Classification of Spinal Injury Patients;American Spinal Injury Association,1989
3. Standards for Neurological and Functional Classification of Spinal cord Injury, Revised 1992;American Spinal Injury Association/International Medical Society of Paraplegia,1992
4. International Standards for Neurological and Functional Classification of Spinal cord Injury, Revised 1996;American Spinal Injury Association/International Medical Society of Paraplegia,1996
5. Comparison of functional and medical assessment in the classification of persons with spinal cord injury;Bednarczyk;J Rehabil Res Dev,1993