On $K_{s,t}$-minors in graphs with given average degree, Discrete Mathematics 308 (2008) 4435-4445 (with A.V. Kostochka) ps pdf

Highly Connected Monochromatic Subgraphs of Multicoloured Graphs, (to appear in Journal of Graph Theory) (with H. Liu and R.D. Morris) ps pdf

Highly Connected Multicoloured Subgraphs of Multicoloured Graphs, (with H. Liu and R.D. Morris) ps pdf

Mobile Eternal Security in Graphs (with E.W. Chambers and W. Kinnersley) ps pdf

Minimum Difference Representations of Graphs (with J. Balogh ) ps pdf

Nordhaus-Gaddum Bounds for k-Domination in Graphs ps pdf

Extremal Problems for Roman Domination (with E.W. Chambers, W. Kinnersley, and D.B. West ) ps pdf

Highly Connected Monochromatic Subgraphs: Addendum (with H. Liu and R.D. Morris) ps pdf

The Bookthickness of a Graph (with Q. Liu, J. Vandenbussche, D. West , and Gexin Yu) ps

Union-Closed Families (with D. West and L. Wiman) ps

Thresholds for Roman Domination ps pdf

There are Infinitely Many Primes Congruent to 5 (mod 6) ps