DeLeon, S., Halitschke, R., Hames, R. S., Kessler, A., DeVoogd, T. J., & Dhondt, A. A. (2013). The effect of polychlorinated biphenyls on the song of two passerine species. PLoS One, 8(9): e73471. doi:10.1371/journal.pone.0073471.