McKay, B.D.; Mays Jnr, H.L.; Tao, C.-T.; Wan, D.; Higuchi, H.; Nishium, I. (2014). “Incorporating color into integrative taxonomy: analysis of the Varied Tit(Sittiparus varius) complex in East Asia”. Systems Biology63 (4): 505–517. doi:10.1093/sysbio/syu016. PMID24603127.
McKay, B.D.; Mays Jnr, H.L.; Tao, C.-T.; Wan, D.; Higuchi, H.; Nishium, I. (2014). “Incorporating color into integrative taxonomy: analysis of the Varied Tit(Sittiparus varius) complex in East Asia”. Systems Biology63 (4): 505–517. doi:10.1093/sysbio/syu016. PMID24603127.