Odd induced subgraphs in graphs of maximum degree three. - David M. Berman; Hong Wang 005; Larry Wargo (Australas. J Comb., 1997)

All trees contain a large induced subgraph having all degrees 1 (mod k). - David M. Berman; A. J. Radcliffe; Alex D. Scott; Hong Wang 005; Larry Wargo (Discret. Math., 1997)

Induced stars in trees. - David M. Berman; Jiannong Liu; Hong Wang 005; Larry Wargo (Australas. J Comb., 1998)