Sonboli, A.; Stroka, K.; Kazempour Osaloo, S.; Oberprieler, C. (2011). Molecular phylogeny and taxonomy of Tanacetum L. (Compositae, Anthemideae) inferred from nrDNA ITS and cpDNA trnH–psbA sequence variation. Plant Systematics and Evolution. 298(2): 431-444.