Lee Sang-im; Parr Cynthia S.; Hwang Youna; Mindell David P. & Choea Jae C. (2003): Phylogeny of magpies (genus Pica) inferred from mtDNA data. Molecular Phylogenetics and Evolution29: 250-257. doi:10.1016/S1055-7903(03)00096-4Toàn văn PDF
Kryukov A. P., L. N. Spiridonova, S. Mori, V. Yu. Arkhipov, Y. A. Red'kin, O. A. Goroshko, E. G. Lobkov & E. Haring (2017). Deep phylogeographic breaks in magpie Pica pica across the Holarctic: concordance with bioacoustics and phenotypes. Zool. Sci. 34(3): 185-201. doi:10.2108/zs160119.
nrm.se
Ericson Per G. P.; Jansén Anna-Lee; Johansson Ulf S. & Ekman Jan (2005): Inter-generic relationships of the crows, jays, magpies and allied groups (Aves: Corvidae) based on nucleotide sequence data. Journal of Avian Biology36: 222-234. Toàn văn PDFLưu trữ 2017-08-10 tại Wayback Machine
umich.edu
ummz.lsa.umich.edu
Lee Sang-im; Parr Cynthia S.; Hwang Youna; Mindell David P. & Choea Jae C. (2003): Phylogeny of magpies (genus Pica) inferred from mtDNA data. Molecular Phylogenetics and Evolution29: 250-257. doi:10.1016/S1055-7903(03)00096-4Toàn văn PDF
web.archive.org
Ericson Per G. P.; Jansén Anna-Lee; Johansson Ulf S. & Ekman Jan (2005): Inter-generic relationships of the crows, jays, magpies and allied groups (Aves: Corvidae) based on nucleotide sequence data. Journal of Avian Biology36: 222-234. Toàn văn PDFLưu trữ 2017-08-10 tại Wayback Machine