Verbatim text: Wolf, S. J and K. E. Denford. 1984. Taxonomy of Arnica (Compositae) subgenus Austromontana. Rhodora 86: 239–309.
Author: Wolf, S.J., Denford, K.E.
Year: 1984
Title: Taxonomy of Arnica (Compositae) subgenus Austromontana
Journal: Rhodora
Volume: 86
Pages: 239–309