[1]
Chrtek, J. 2009. British Alpine Hawkweeds: A Monograph of British Hieracium section Alpina . D. J. Tennant & T. C. G. Rich. . Edinburgh Journal of Botany. 66, 3 (Oct. 2009), 487–488. DOI:https://doi.org/10.1017/S0960428609990096.