DeVore, Melanie L., and Kathleen B. Pigg. “Donald Pinkava’s Journey from Asteraceae to Cactaceae: From the Ohio State University to Arizona State University”. Journal of the Botanical Research Institute of Texas 16, no. 1 (July 15, 2022): 273–280. Accessed April 18, 2024. https://journals.brit.org/jbrit/article/view/1232.