http://compneuro.uwaterloo.ca/files/publications/eliasmith.2013a.pdf
http://compneuro.uwaterloo.ca/files/publications/bekolay.2014.pdf
http://clm.utexas.edu/compjclub/papers/Eliasmith2012.pdf
http://compneuro.uwaterloo.ca/files/publications/sharma.2016.pdf