Poinar, Jr., G. ., and A. . Brown. “Dating the Co-Evolution Between Bees and Beetle Triungulins (Coleoptera: Cleridae) to the Mid-Cretaceous”. Biosis: Biological Systems, vol. 1, no. 1, Mar. 2020, pp. 02-07, doi:10.37819/biosis.001.01.0051.