1. A. Bovykin, Exact unprovability thresholds for graph minor theorems. Preprint, 2008
2. The random planar graph;Denise;Congressus Numerantium,1996
3. Analytic Combinatorics;Flajolet,2008
4. The metamathematics of the graph minor theorem;Friedman;Contemporary Mathematics,1987
5. Graphical Enumeration;Harary,1973