Marshall, J. L., M. L. Arnold, and D. J. Howard. 2002. "Reinforcement: The road not taken." Trends in Ecology & Evolution 17:558-563.
Howard, D. J., S.C. Britch, W.E. Braswell, and J.L. Marshall. 2003. "Evolution in hybrid zones", pp. 297-314. In R.S. Singh and M.K. Uyenoyama (eds.), The Evolution of Population Biology. Cambridge University Press, Cambridge.
Swenson, N.G. and D. J. Howard. 2004. "Do suture zones exist?"
Evolution 58: 2391-2397.
Swenson, N.G. and D. J. Howard. 2005. "Clustering of contact zones, hybrid zones, and phylogeographic breaks in North America." The American Naturalist 166:581-591.
Braswell, W.E., J.A. Andrés, L.S. Maroja, R.G. Harrison, D. J. Howard, and W.J. Swanson. 2006. "Identification and comparative analysis of accessory gland proteins in Orthoptera." Genome 49:1069-1080.
Britch, S.C., E.J. Swartout, D.D. Hampton, M.L. Draney, J. Chu, J.L. Marshall, and D. J. Howard. 2007. "Genetic architecture of conspecific sperm precedence."
Traylor, T., A. Birand, J.L. Marshall, and D. J. Howard. 2008. "A zone of overlap and hybridization between Allonemobius socius and a new Allonemobius spp." Annals of the Entomological Society of America. 101:30-39.
Birand, A.C. and D. J. Howard. 2008. "The relationship between proportion of endemics and species diversity on islands: expectations from a null model." Ecography 31:286-288.
Ross, C.H., J. H. Benedix, Jr., C. Garcia, K. Lambeth, R. Perry, V. Selwyn, and D. J. Howard. 2008. "Scale-independent criteria and scale-dependent agents determining the structure of a ground cricket mosaic hybrid zone." Biological Journal of the Linnean Society
Howard, D. J., S. R. Palumbi, L. Birge, M. K. Manier. 2009. "Sperm and speciation", pp. 367-403. In T.R. Birkhead, D.J. Hosken and S. Pitnick (eds.), Sperm Biology: an Evolutionary Approach. Elsevier Press.