Hyviä lähteitä
Borgatti, Stephen P. - Everett, Martin G. (1992): Notions of Position in Social Network Analysis. Teoksessa: Leinhardt, Samuel (toim.): Sociological Methodology. Basil Blackwell. Oxford.
Faust, Katherine (1988): Comparison of Methods for Positional Analysis: Structural and General Equivalences. Social Networks 10: 313-341.
Winship, Christopher - Mandel, Michael (1983): Roles and Positions: A Critique and Extension of the Blockmodelling Approach. Teoksessa Leinhardt, Samuel (toim.): Sociological Methodology 1983-1984. Jossey Bass. San Francisco.