Before revision:  In the present paper we propose an algorithm to obtain statistically-validated  projections of bipartite networks . The criterion adopted to quantify the similarity of nodes rests upon the similarity of their neighborhoods : in order for any two nodes to be linked, a significantly-large number of neighbors must be shared.
After revision:  In the present paper we propose an algorithm to obtain statistically-validated projections of bipartite networks , which implements a simple rule : in order for any two nodes to be linked, a significantly-large number of neighbors must be shared.