Cubas P, Pardo C, Tahiri H (2002). Molecular approach to the phylogeny and systematics of Cytisus (Leguminosae) and related genera based on nucleotide sequences of nrDNA (ITS region) and cpDNA (trnL–trnF intergenic spacer). Plant Systematics and Evolution. 233 (3–4): 223—242. doi:10.1007/s00606-002-0194-0.