TENNANT, D.J. and RICH, T.C.G. 2002. DISTRIBUTION MAPS AND IUCN THREAT CATEGORIES FOR HIERACIUM SECTION ALPINA (ASTERACEAE ) IN BRITAIN. Edinburgh Journal of Botany. 59, 3 (Nov. 2002), 351–372. DOI:https://doi.org/10.1017/S0960428602000215.