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http://www.erm.ecs.soton.ac.uk/theme2/what_is_your_paradigm.html
http://www.qualitative-research.net/index.php/fqs/article/view/1299/3163
http://busn8018researchblog-xwchan.blogspot.com/2013/02/ontology-epistemology-methodology.html
http://www.stat.ncsu.edu/people/reiland/courses/st101/