Quaternary vertebrate paleontology with emphasis on the paleoecology of Pleistocene and Holocene micromammals, zooarchaeology of archaeological sites on the northern Great Plains.
Semken, Holmes A. Jr., and Carl R. Falk. 2014. Ecology and Environmental Degradation of Two Little Ice Age Earthlodge Villages in North Dakota: The Micromammal Evidence. IN Archaeology, Zooarchaeology, and Malacology: A Festschrift for James L. Theler. (Matthew G. Hill, Ed.). The Wisconsin Archeologist: 95(2):249-264.
Fulton, Tara L. Ryan W. Norris, Russell W. Graham, Holmes A. Semken Jr. 2013. Ancient DNA supports southern survival of Richardson's collared lemming (Dicrostonyx richardsoni) during the last glacial maximum. Molecular Ecology 22: 2540–2548. DOI: 10.1111/mec.12267
Semken, Holmes A., Jr., Russell W. Graham and Thomas W. Stafford, Jr. 2010. AMS 14C analysis of Late Pleistocene non-analog faunal components from 21 cave deposits in southeastern North America. Quaternary International 217: 240-255. DOI: 10.1016/j.quaint.2009.11.031