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Hobson, Keith A., Kevin J. Kardynal, Steven L. Van Wilgenburg, Gretchen Albrecht, Antonio Salvadori, Michael D. Cadman, Felix Liechti, a James W. Fox. "A Continent-Wide Migratory Divide in North American Breeding Barn Swallows (Hirundo Rustica)." PLoS One 2015.

Hobson, Keith A., et al. "A Continent-Wide Migratory Divide in North American Breeding Barn Swallows (Hirundo Rustica)." PLoS One 2015.