1. Dowling, G. A. (1985). Levels of cognitive functioning: Evaluation of interrater reliability. Journal of Neurosurgical Nursing, 17(2), 129–134.
2. Gouvier, W., Blanton, P., LaPorte, K., & Nepomuceno, C. (1987). Reliability and validity of the disability rating scale and the levels of cognitive functioning scale in monitoring recovery from severe head injury. Archives of Physical Medicine and Rehabilitation, 68, 94–97.
3. Hagen, C., Malkmus, D., & Durham, P. (1972). Levels of cognitive functioning. Downey: Rancho Los Amigos Hospital.
4. The Center for Outcome Measurement in Brain Injury. Introduction to the Level of Cognitive Functioning Scale. http://www.tbims.org/combi/lcfs/index.html. Accessed 29 June 2016
5. Van Baalen, B., van Woensel, M. P. C., van Kessel, M. A., Roebroeck, M. E., & Stam, H. J. (2006). Reliability and sensitivity to change of measurement instruments used in a traumatic brain injury population. Clinical Rehabilitation, 20, 686–700.