[AP] S. ARNBORG A. PROSKUROWSKI: Linear time algorithms for NP-hard problems on graphs embedded in k-trees. submitted.
[AP1] S. ARNBORG A. PROSKUROWSKI: 
Characterization and recognition of partial 3-trees. SIAM 3. Alg. Disc. Math. Vol.7, No. 2 (1986), 305-314. 
MR 0830649[FL] M. FELLOWS M. LANGSTON: 
Nonconstructive tools for proving polynomial-time decidability. to appear in JACM. 
MR 0963169[KGK] J. KRATOCHVÍL J. GOLIAN P. KUČERA: String graphs. Academia, Prague (1987), p. 105.
[MT] J. MATOUŠEK R. THOMAS: Algorithms finding tree-decompositions of graphs. submitted.
[NT] J. NEŠETŘIL R. THOMAS: 
A note on spatial Representation of Graphs. Comment. Math. Univ. Carolinae 26 (1985), 655-659. 
MR 0831801[RS1] N. ROBERTSON P. S. SEYMOUR: 
Graph Minors V. Excluding a planar graph. J. Combin. Theory, Ser. B 41 (1986), 92-114. 
MR 0854606[RS2] N. ROBERTSON P. D. SEYMOUR: Graph Minors X. Obstructions to treedecomposition. submitted.
[RS3] N. ROBERTSON P. D. SEYMOUR: Graph Minors XIII. The disjoint paths problem. submitted.
[T] R. THOMAS: 
Graphs without $K_4$ and well-quasi-ordering. J. Combin. Theory, Ser. (B) 38 (1985), 240-247. 
MR 0796601