1. Screening Drought-Tolerant Native Plants for Attractiveness to Arthropod Natural Enemies in the U.S. Great Lakes Region. Gibson DR et al (2019). Environ Entomol. DOI: 10.1093/ee/nvz134 PubMed: 31701140
2. Germacranolide, Hydroxyverbenon und ent-Kaur-15(16)-en-17,19-disäure aus Helianthus occidentalis var. dowellianus. Bohlmann F et al (1984). Planta Med. PubMed: 17340297
3. Genetic structure of Helianthus occidentalis (Asteraceae) in a preserve withfragmented habitat. Foré SA and Guttman SI (1999). Am J Bot. PubMed: 10406722