Greuter (Huter, Porta & Rigo) 2003 - Greuter W, & CO, Vogt R (2003) The Euro+Med treatment of Anthemideae ( Compositae ) — generic concepts and required new names. Willdenowia 33: 37-43. doi: 10.3372/wi.33.33102.
There is no corrections for Achillea rupestris subsp. calcarea yet.