Doubleday, L.A.D. and Eckert, C.G. 2018. Experimental evidence for predominant nocturnal pollination despite more frequent diurnal visitation in Abronia umbellata (Nyctaginaceae). Journal of Pollination Ecology. 22, (Mar. 2018), 67–74. DOI:https://doi.org/10.26786/1920-7603(2018)six.