Schrey, A. ., Grispo, M. ., Awad, M. ., Cook, M. ., McCoy, E. ., Mushinsky, H. ., … Martin, L. . (2011). Broad-scale latitudinal patterns of genetic diversity among native European and introduced house sparrow (Passer domesticus) populations. Molecular Ecology, 20(6), 1133-43. https://doi.org/10.1111/j.1365-294X.2011.05001.x (Original work published 2011)

Westneat, D. ., , Burke, T. ., Chastel, O. ., Jensen, H. ., Kvalnes, T. ., … Stewart, I. . (2014). Multiple aspects of plasticity in clutch size vary among populations of a globally distributed songbird. The Journal of Animal Ecology, 83(4), 876-87. https://doi.org/10.1111/1365-2656.12191

Sánchez-Tójar, A. ., Nakagawa, S. ., Sánchez-Fortún, M. ., Martin, D. ., Ramani, S. ., Girndt, A. ., … Schroeder, J. . (2018). Meta-analysis challenges a textbook example of status signalling and demonstrates publication bias. ELife, 7. https://doi.org/10.7554/eLife.37385 (Original work published 2018)