1. Lecture Notes in Computer Science;N. Bonichon,2002
2. Brehm, E.: 3-Orientations and Schnyder 3-tree-decompositions. Diploma Thesis, FB mathematik und Informatik, Freie Universität Berlin (2000)
3. Lecture Notes in Computer Science;H.-L. Chen,2002
4. Chiang, Y.-T., Lin, C.-C., Lu, H.-I.: Orderly spanning trees with applications to graph encoding and graph drawing. In: Proc. of the 12th Annual ACM-SIAM SODA, pp. 506–515 (2001)
5. Lecture Notes in Computer Science;U. Fößmeier,1996