1. N. Abbas, Graph clustering: complexity, sequential and parallel algorithms, Ph.D. Thesis, Dept. of Computing Science, University of Alberta, 1995.
2. S.G. Akl, Parallel Computation: Models and Methods, Prentice-Hall, Englewood Cliffs, NJ, 1997.
3. H. L. Bodlaender, J.S. Deogun, K. Jansen, T. Kloks, D. Kratsch, H. Müller, Zs. Tuza, Rankings of graphs, WG 94, Herrsching, 1994, Lecture Notes in Computer Science, Vol. 903, Springer, Berlin, 1995, pp. 292–304.
4. Rankings of graphs;Bodlaender;SIAM J. Discrete Math.,1998
5. A. Brandstädt, Classes of bipartite graphs related to chordal graphs and domination of one color class by the other, Technical Report N/88/10, Friedrich-Schiller-Universität, Jena, 1988.