1. Aldrich, H. (1999). Organizations Evolving. Sage Publications, Thousand Oaks and London.
2. Anheier, H.K., and Ben-Ner. A. (1997). The Shifting Boundaries: Long-terms Changes in the Size of the Forprofit, Nonprofit, Cooperative and Government Sectors. Annals of Public and Cooperative Economics. 68 (3), 335–354.
3. Anheier, H.K., and Ben-Ner. A. (forthcoming 2002 ). The Study of Nonprofit Enterprise: Theories and Approaches. Kluwer/Plenum Academic Publishers, New York.
4. Anheier, H.K., and Kendall, J. (eds) (2001). The Third Sector at the Crossroads. Routledge, London.
5. Anheier, H.K., and Seibel, W. (2001). The Nonprofit Sector in Germany. Manchester University Press, Manchester.