The structure of large networks can be revealed by partitioning them to
smaller parts, which are easier to handle. One of such decompositions is based
on $k$--cores, proposed in 1983 by Seidman. In the paper an efficient, $O(m)$,
$m$ is the number of lines, algorithm for determining the cores decomposition
of a given network is presented.
[cs/0310049] An O(m) Algorithm for Cores Decomposition of Networks