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Mason, D. L. (September 1973). "Host-Parasite Relations in the Gibberidea Disease of Helianthus strumosus". Mycologia. 65 (5): 1158–1170. doi:10.2307/3758295. ISSN0027-5514. JSTOR3758295.
Mason, D. L. (September 1973). "Host-Parasite Relations in the Gibberidea Disease of Helianthus strumosus". Mycologia. 65 (5): 1158–1170. doi:10.2307/3758295. ISSN0027-5514. JSTOR3758295.
Antonio, Thomas M; Masi, Susanne (2013). The Sunflower Family in the Upper Midwest: a Photographic Guide to the Asteraceae in Illinois, Indiana, Iowa, Michigan, Minnesota, and Wisconsin. ISBN978-1-883362-12-6. OCLC1040764069.
Mason, D. L. (September 1973). "Host-Parasite Relations in the Gibberidea Disease of Helianthus strumosus". Mycologia. 65 (5): 1158–1170. doi:10.2307/3758295. ISSN0027-5514. JSTOR3758295.