Primary literature includes documents written at the time of a study, and present the information or raw data resulting from original research conducted by the authors.
Article segments from:
Livshits, A., Rappaport, Z.H., Livshits, V., & Gepstein, R. (2002). Surgical treatment of painful spasticity after spinal cord injury. Spinal Cord, 40, 161-166.
Secondary Sources are documents that analyze, interpret, discuss or evaluate existing research.