Chen XY, Wolpaw J, Jakeman LB, Stokes BT. Operant conditioning of H-reflex increase in spinal cord?injured rats. Journal of neurotrauma [Internet]. 1999;16:175?186. http://www.ncbi.nlm.nih.gov/pubmed/10098962

Chen XY, Wolpaw J, Jakeman LB, Stokes BT. Operant conditioning of H-reflex in spinal cord-injured rats. Journal of neurotrauma [Internet]. 1996;13:755?766. http://www.ncbi.nlm.nih.gov/pubmed/9002061

Chen XY, Wolpaw J. Reversal of H-reflex operant conditioning in the rat. Experimental brain research. Experimentelle Hirnforschung. Expérimentation cérébrale [Internet]. 1996;112:58?62. http://www.ncbi.nlm.nih.gov/pubmed/8951407