Fruits of an "Old World" tribe (Phytocreneae; Icacinaceae) from the Paleogene of North and South AmericaDOI: info:10.1600/036364412X648724v. 37No. 3The American Society of Plant Taxonomists784–794
Stull, Gregory W., Herrera, Fabiany, Manchester, Steven R., Jaramillo, Carlos A., and Tiffney, Bruce H. 2012. "Fruits of an "Old World" tribe (Phytocreneae; Icacinaceae) from the Paleogene of North and South America." Systematic Botany, 37, (3) 784–794. https://doi.org/10.1600/036364412X648724.