Sally Adee, ‘Zap Your Brain into the Zone: Fast Track to Pure Focus’, New Scientist, 6 February 2012, accessed 22 December 2014, http://www.newscientist.com/article/mg21328501.600–zap-your-brain-into-the-zone-fast-track-to-pure-focus.html. See also: R. Douglas Fields, ‘Amping Up Brain Function: Transcranial Stimulation Shows Promise in Speeding Up Learning’, Scientifc American, 25 November 2011, accessed 22 December 2014, http://www.scientifcamerican.com/article/amping-up-brain-function.
