Blau, P. M. (1974). On the nature of organizations. American Journal of Sociology, 82(5). 1130–1132.
Delmastro, M. (2002). The determinants of the management hierarchy: Evidence from Italian plants. International Journal of Industrial Organization, 20(1), 119–137.
Graubner, M. (2006). Task, firm size, and organizational structure in management consulting: An empirical analysis from a contingency perspective (Vol. 63). Frankfurt, Germany: Deutscher Universitats-Verlag.
