Li-Bing Zhang, J. W. Kadereit: Classification of Primula sect. Auricula (Primulaceae) based on two molecular data sets (ITS, AFLPs), morphology and geographical distribution. In: Botanical Journal of the Linnean Society. Band 146, Nr. 1, 2004, S. 1–26, doi:10.1111/j.1095-8339.2004.00301.x