Han, Kin-Lan, Braun, Edward L., Kimball, Rebecca T., Reddy, Sushma, Bowie, Rauri C. K., Braun, Michael J., Chojnowski, Jena L., Hackett, Shannon J., Harshman, John, Huddleston, Christopher J., Marks, Ben D., Miglia, Kathleen J., Moore, William S., Sheldon, Frederick H., Steadman, David W., Witt, Christopher C., and Yuri, Tamaki. 2011. "Are Transposable Element Insertions Homoplasy Free?: An Examination Using the Avian Tree of Life." Systematic Biology. 60 (3):375–386. https://doi.org/10.1093/sysbio/syq100