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Design for six sigma for green belts and champions : applications for service operations - foundations, tools, DMADV, cases, and certification
Gitlow, Howard, (2006)
Lean six sigma service : a guide to green belt certification and bottom line improvement
Taylor, Gerald M., (2009)
Entrepreneurial competences, liability of newness and infant survival : Evidence from the service industry
Abatecola, Gianpaolo, (2016)