MEEWATTANA, P. Sound Wave Frequency Study to Annoy in Wild Elephants. The Thailand Natural History Museum Journal, [S. l.], v. 3, n. 1, p. 69–73, 2008. Disponível em: https://li05.tci-thaijo.org/index.php/thnhmj/article/view/1772. Acesso em: 5 oct. 2026.