1. Adkins, B. A., Foth, M., Summerville, J. A., & Higgs, P. L. (2007). Ecologies of innovation: Symbolic aspects of cross-organizational linkages in the design sector in an Australian inner-city area. American Behavioral Scientist, 50(7), 922–934. doi:10.1177/0002764206298317.
2. Alario-Hoyos, C., Pérez-Sanagustín, M., Delgado-Kloos, C., Parada, H. A., Muñoz-Organero, M., & Rodríguez-de-las-Heras, A. (2013). Analysing the impact of built-in and external social tools in a MOOC on educational technologies. In D. Hernández-Leo, T. Ley, R. Klamma, & A. Harrer (Eds.), Scaling up learning for sustained impact. 8th European conference, on technology enhanced learning, EC-TEL 2013, Paphos, Cyprus, September 17–21, 2013. Proceedings (Vol. 8095, pp. 5–18). Berlin Heidelberg: Springer.
3. Anderson, T. (2008). Toward a theory of online learning. In T. Anderson (Ed.), Theory and practice of online learning (2nd ed., pp. 45–74). Edmonton, AB: AU Press, Athabasca University.
4. Anderson, T., & Dron, J. (2011). Three generations of distance education pedagogy. The International Review of Research in Open and Distance Learning, 12(3), 80–97.
5. Aubusson, P. (2002). An ecology of science education. Int J Sci Educ, 24(1), 27–46. doi:10.1080/09500690110066511.