George, A., & Bennett, A. (2005). Case studies and theory development in the social sciences. Cambridge, MA: MIT Press.

Mainzer, K. (2007). Thinking in complexity (5th rev. and enlarged ed.). New York: Springer.

Stacey R., & Griffin, D. (2005). A complexity perspective on researching organizations. London: Routledge.

Stake, R. (1995). The art of case study research. Thousand Oaks, CA: Sage.

Sumara, D., & Davis, B. (1997). Enlarging the space of the possible: Complexity, complicity and action research practices. In T. Carson & D. Sumara (Eds.), Action research as a living practice (pp. 299-312). New York: Peter Lang.

Yin, R. (2003). Case study research: Design and methods. Thousand Oaks: Sage Publications.