References
For Pilosella
Bräutigam, S., and W. Greuter. 2007. A new treatment of Pilosella for the Euro-Mediterranean flora. Willdenowia 37: 123-137. Google Scholar
Cronquist, A. 1980. Asteraceae, Volume I, Vascular flora of the Southeastern United States. University of North Carolina Press, Chapel Hill, N.C. Google Scholar
Kilian, N., B. Gemeinholzer, and H.W. Lack. 2009. Cichoriae. Pp. 343-383 in V.A. Funk, A. Susanna, T.F. Stuessy, and R.J. Bayer, eds. 2009. Systematics, evolution, and biogeography of Compositae. IAPT, Vienna, Austria. 965 pp. Google Scholar
Strother, J.L. 2006t. Hieracium. In Flora of North America Editorial Committee. 2006a. Flora of North America north of Mexico. Volume 19, Magnoliophyta: Asteridae, part 6: Asteraceae, part 1. Oxford Univ. Press, New York, NY. 579 pp. Google Scholar