Wolfe, J.A. (1977). Paleogene floras from the Gulf of Alaska region (Report). Professional Paper. United States Geological Survey. pp. 1–108. doi:10.3133/pp997. 997.
Benedict, JC; DeVore, ML; Pigg, KB (2011). "Prunus and Oemleria (Rosaceae) Flowers from the Late Early Eocene Republic Flora of Northeastern Washington State, U.S.A.". International Journal of Plant Sciences. 172 (7): 948–958. doi:10.1086/660880. S2CID39391439.
Takahashi, A.; Suzuki, M. (1988). "Two new fossil woods of Acer and a new combination of Prunus from the Tertiary of Japan". Botanical Magazine (Tokyo). 101 (4): 473–481. doi:10.1007/bf02488089. S2CID29973912.
Li, Y.; Smith, T.; Liu, C.; Awasthi, N.; Yang, J.; Wang, Y.; Li, C. (2011). "Endocarps of Prunus (Rosaceae: Prunoideae) from the early Eocene of Wutu, Shandong Province, China". Taxon. 60 (2): 555–564. doi:10.1002/tax.602021.
Peppe, D.; Hickey, L.; Miller, I.; Green, W. (2008). "A morphotype catalogue, floristic analysis and stratigraphic description of the Aspen Shale flora (Cretaceous–Albian) of southwestern Wyoming". Bulletin of the Peabody Museum of Natural History. 49 (2): 181–208. doi:10.3374/0079-032X-49.2.181. S2CID140184999.
Stull, G.; Adams, N.; Manchester, S.; Sykes, D.; Collinson, M. (2016). "Revision of Icacinaceae from the Early Eocene London Clay flora based on X-ray micro-CT". Botany. 94 (9): 713–745. doi:10.1139/cjb-2016-0063. hdl:1807/73733.
Stull, G.; Adams, N.; Manchester, S.; Sykes, D.; Collinson, M. (2016). "Revision of Icacinaceae from the Early Eocene London Clay flora based on X-ray micro-CT". Botany. 94 (9): 713–745. doi:10.1139/cjb-2016-0063. hdl:1807/73733.
Benedict, JC; DeVore, ML; Pigg, KB (2011). "Prunus and Oemleria (Rosaceae) Flowers from the Late Early Eocene Republic Flora of Northeastern Washington State, U.S.A.". International Journal of Plant Sciences. 172 (7): 948–958. doi:10.1086/660880. S2CID39391439.
Takahashi, A.; Suzuki, M. (1988). "Two new fossil woods of Acer and a new combination of Prunus from the Tertiary of Japan". Botanical Magazine (Tokyo). 101 (4): 473–481. doi:10.1007/bf02488089. S2CID29973912.
Peppe, D.; Hickey, L.; Miller, I.; Green, W. (2008). "A morphotype catalogue, floristic analysis and stratigraphic description of the Aspen Shale flora (Cretaceous–Albian) of southwestern Wyoming". Bulletin of the Peabody Museum of Natural History. 49 (2): 181–208. doi:10.3374/0079-032X-49.2.181. S2CID140184999.