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Palinkas, L. A., Horwitz, S. M., Green, C. A., Wisdom, J. P., Duan, N., & Hoagwood, K. (2015). Purposeful sampling for qualitative data collection and analysis in mixed method implementation research. Administration and Policy in Mental Health, 42(5), 533–544. Retrieved from https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4012002/

Treviño, L. K., den Nieuwenboer, N. A., Kreiner, G. E., & Bishop, D. G. (2014). Legitimating the legitimate: A grounded theory study of legitimacy work among Ethics and Compliance Officers. Organizational Behavior and Human Decision Processes, 123(2), 186–205. Retrieved from http://www.sciencedirect.com/science/article/pii/S0749597813000927