A review article in Science on the use of social networks in the social sciences. Discusses the types of ties that might exist between nodes (including interactions and firm relations, such as “mother of”), common descriptive properties (“small world”, “homophily”, “centrality”, etc.), and types of questions concerning the formation and dynamics of such a network that have been analyzed in such a graph-theoretic framework. Fairly basic if you know the field, but useful as a mint of citations.
http://www.steveborgatti.com/papers/SNA_Review_for_Science.pdf
A Fine Theorem 