Johansson, U.S.; Ekman, J.; Bowie, R.C.K.; Halvarsson, P.; Ohlson, J.I.; Price, T.D.; Ericson, P.G.P. (2013). "A complete multilocus species phylogeny of the tits and chickadees (Aves: Paridae)". Molecular Phylogenetics and Evolution69 (3): 852–860. doi:10.1016/j.ympev.2013.06.019. பப்மெட்:23831453.
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. பப்மெட்:24603127.
Johansson, U.S.; Ekman, J.; Bowie, R.C.K.; Halvarsson, P.; Ohlson, J.I.; Price, T.D.; Ericson, P.G.P. (2013). "A complete multilocus species phylogeny of the tits and chickadees (Aves: Paridae)". Molecular Phylogenetics and Evolution69 (3): 852–860. doi:10.1016/j.ympev.2013.06.019. பப்மெட்:23831453.
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. பப்மெட்:24603127.