K. Borgwardt, and H. Kriegel. Proceedings of the Fifth IEEE International Conference on Data Mining (ICDM 2005), page 74--81. Washington, DC, USA, IEEE Computer Society, (2005)
M. Latapy, C. Magnien, and N. Vecchio. (February 2008)the article defines and discusses the basics for complex networks with the focus on bipartite graphs
deals with (weighted) projection approaches;
gives a framework for basic notations.