1. Influences on and from the segmentation of networks: Hypotheses and tests;Baerveldt;Social Networks,1994
2. The core as a solution to exclusionary networks;Bienenstock;Social Networks,1992
3. Exchange and Power in Social Life;Blau,1964
4. Structural Holes: The Social Structure of Competition;Burt,1992
5. Foundations of Social Theory;Coleman,1990