1. Bar-Yehuda, R., Geiger, D., Naor, J.(S.), Roth, R.M.: Approximation algorithms for the vertex feedback set problem with applications to constraint satisfaction and bayesian inference. In: SODA 1994: Proceedings of the Fifth Annual ACM-SIAM Symposium on Discrete Algorithms, Philadelphia, PA, USA, pp. 344–354. Society for Industrial and Applied Mathematics (1994)
2. Lecture Notes in Computer Science;H.L. Bodlaender,2007
3. Bodlaender, H.L., Fomin, F.V., Lokshtanov, D., Penninkx, E., Saurabh, S., Thilikos, D.M.: (meta) kernelization. In: Proceedings of the 2009 50th Annual IEEE Symposium on Foundations of Computer Science, FOCS 2009, pp. 629–638. IEEE Computer Society, Washington, DC (2009)
4. Lecture Notes in Computer Science;H.L. Bodlaender,2008
5. Lecture Notes in Computer Science;K. Burrage,2006