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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.