FORBES, S. A. The Regulative Action of Birds Upon Insect Oscillations. Illinois Natural History Survey Bulletin, Champaign, IL, v. 1, n. 6, p. 3–32, 1883. DOI: 10.21900/j.inhs.v1i6.476. Disponível em: https://iopn.library.illinois.edu/journals/inhs/article/view/476. Acesso em: 9 dec. 2021.