Positive Deviance: Uncovering Innovations that are Invisible in Plain Sight. Kappan, 95(3): 28-33 —- Arvind Singhal (2013) —- http://utminers.utep.edu/asinghal/Singhal-2013-Kappan-Uncovering%20Innovations%20that%20are%20invisible%20in%20plain%20sight.pdf