Graziano, Michael SA, Tyson Aflalo, and Dylan Cooke. 2005. “Arm Movements Evoked by Electrical Stimulation in the Motor Cortex of Monkeys”. Journal of Neurophysiology 94 (6): 4209-23. doi:10.1152/jn.01303.2004. Reference Link
Aflalo, Tyson, and Michael SA Graziano. 2007. “Relationship Between Unconstrained Arm Movements and Single-Neuron Firing in the Macaque Motor Cortex”. Journal of Neuroscience 27 (11): 2760-80. doi:10.1523/JNEUROSCI.3147-06.2007. Reference Link
Graziano, Michael SA. 2006. “Progress in Understanding Spatial Coordinate Systems in the Primate Brain”. Neuron 51 (1): 7-9. doi:10.1016/j.neuron.2006.06.011. Reference Link