Granovetter, Mark. 's "Strength of Weak Ties" Journal of Sociology 107: 281-317.

Krackhardt D., "Assessing the Political Landscape: Structure, Cognition, and Power in Organizations," Administrative Science Quarterly, No. 35, 1990, page 351.

Agencies such as the CIA, FinCEN, and the DEA are using network analysis and link analysis to display data such as telecommunications traffic (which might reveal social networks) or money movement (fraud or laundering detection). In the commercial sector, a supermarket might use link analysis to show that a high percentage of beer buyers also buy diapers at the same time. By moving the diapers so that they are within sight of the beer, they can increase the sales of each.