1. Nonlinear Programming: Theory and Algorithms;Bazaraa,1979
2. On the stability of the cooperative type of organizations;Ben-Ner;J. Comp. Econ.,1984
3. Worker-owned Plywood Companies: An Economic Analysis;Berman,1967
4. Cooperative Value in a Changing World;Böök,1992
5. Fundamentals of Corporate Finance;Brealey,2001