Tree-Thickness and Caterpillar-Thickness under Girth Constraints. - Qi Liu 022; Douglas B. West (Electron. J. Comb., 2008)

Duality for Semiantichains and Unichain Coverings in Products of Special Posets. - Qi Liu 022; Douglas B. West (Order, 2008)

Implications among linkage properties in graphs. - Qi Liu 022; Douglas B. West; Gexin Yu (J. Graph Theory, 2009)

Oriented diameter of graphs with diameter 3. - Peter K. Kwok; Qi Liu 022; Douglas B. West (J. Comb. Theory B, 2010)