Pilosella aurantiaca (English Wikipedia)

Schultz, FW; Schultz-Bipontinus, CH (1862). "Pilosella als eigene Gattum aufgestellt" [Pilosella is set up as a separate genus]. Flora (Separatabdruck). 45: 417–441.

doi.org

Bräutigam, S; Greuter, W (2007). "A new treatment of Pilosella for the Euro-Mediterranean flora". Willdenowia. 37 (1): 123–137. doi:10.3372/wi.37.37106.
Van Der Kooi, C. J.; Pen, I.; Staal, M.; Stavenga, D. G.; Elzenga, J. T. M. (2015). "Competition for pollinators and intra-communal spectral dissimilarity of flowers". Plant Biology. 18 (1): 56–62. doi:10.1111/plb.12328. PMID 25754608.
Seymour, Laura "The Name of Grim: Tracing the Character of Grim the Collier in Sixteenth- and Seventeenth-Century English Theatre" Early Theatre 24.2 (2021), 55–72 https://doi.org/10.12745/et.24.2.4534 Retrieved at 9.12 on Friday 28/6/24

"Pilosella aurantiaca". BBC Gardeners World Magazine. Retrieved 20 July 2022.

"Meadow Mat Wildflower Species: Fox and Cubs". Meadow Mat Wildflower Matting. Retrieved 27 January 2019.

Van Der Kooi, C. J.; Pen, I.; Staal, M.; Stavenga, D. G.; Elzenga, J. T. M. (2015). "Competition for pollinators and intra-communal spectral dissimilarity of flowers". Plant Biology. 18 (1): 56–62. doi:10.1111/plb.12328. PMID 25754608.

Van Der Kooi, C. J.; Pen, I.; Staal, M.; Stavenga, D. G.; Elzenga, J. T. M. (2015). "Competition for pollinators and intra-communal spectral dissimilarity of flowers". Plant Biology. 18 (1): 56–62. doi:10.1111/plb.12328. PMID 25754608.

"Orange hawkweed (Hieracium aurantiacum)". Minnesota Department of Natural Resources. Retrieved 2020-10-08.

Venning, Frank D. (1984). A Guide to Field Identification Wildflowers of North America. New York: Golden Press. OCLC 301214740.