1. Abell, D. F. (1980). Defining the business—The starting point of strategic planning. Englewood Cliffs, NJ: Prentice-Hall.
2. Andersen, P. H., Christensen, P. R., & Damgaard, T. (2009). Diverging expectations in buyer–seller relationships: Institutional contexts and relationship norms. Industrial Marketing Management, 38(7), 814–824. doi:
10.1016/j.indmarman.2008.04.016
.
3. Backhaus, K., & Schneider, H. (2009). Strategisches marketing (2nd ed.). Stuttgart: Schäffer-Poeschel.
4. Bonoma, T., Zaltman, G., & Johnston, W. (1977). Industrial buying behavior. Cambridge, MA: Marketing Science Institute.
5. Brück, T., & Schumacher, D. (2004). Die wirtschaftlichen Folgen des internationales Terrorismus. Beilage zur Wochenzeitung Das Parlament., 44–46.