1- J. Will M. Bertrand, Jan C. Fransoo (2002) Operations management research methodologies using quantitative modeling. International Journal of Operations & Production Management, vol. 22:2, pp. 241-264.
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2- Cipriano Forza (2002) Survey research in operations management: a process-based perspective. International Journal of Operations & Production Management, vol. 22:2, pp. 152-194. 
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3- Paul Coughlan, David Coghlan (2002) Action research for operations management. International Journal of Operations & Production Management, vol. 22:2, pp. 220-240.
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4- Chris Voss, Nikos Tsikriktsis, Mark Frohlich (2002) Case research in operations management. International Journal of Operations & Production Management, vol. 22:2, pp. 195-219.
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5- Robert K Yin (1981) The Case Study Crisis: Some Answers. Administrative Science Quarterly, vol. 26:1, pp. 58-65.
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6- Gerald I Susman, Roger D Evered (1978) An Assessment of the Scientific Merits of Action Research. Administrative Science Quarterly, vol. 23:4, pp. 582-603.
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