Book (marcus.2011)
Marcus, A.
Design, User Experience, and Usability. Theory, Methods, Tools and Practice - First International Conference, DUXU 2011, Held as Part of HCI International 2011, Orlando, FL, USA, July 9-14, 2011, Proceedings, Part I
Springer, 2011

Book (George.2005)
George, A. L. & Bennett, A.
Case Studies and Theory Development in the Social Sciences
MIT Press, 2005

Book (Popper.2002)
Popper, K. R.
The Logic of Scientific Discovery
Taylor & Francis, 2002

Book (Klein.2000)
Klein, K. J. & Kozlowski, S. W. J. (ed.)
Multilevel Theory, Research, and Methods in Organizations: Foundations, Extensions, and New Directions
Jossey Bass, 2000