Zitomer, Rachel A, Sara M Galbraith, Matthew G Betts, Andrew R. Moldenke, Robert A Progar, y James W Rivers. «Taxonomic Voucher Specimens for Study of Bee Communities in Intensively Managed Douglas-Fir Forests in the Oregon Coast Range». Catalog: Oregon State Arthropod Collection 7, no. 1 (enero 18, 2023). Accedido mayo 20, 2024. https://journals3.library.oregonstate.edu/CatalogOSAC/article/view/5937.