Palestrini, C. et al. 1990. Acoustic signals and stridulatory apparatus in Copris incertus Say (Coleoptera Scarabaeidae: Coprinae). ACTA ZOOLÓGICA MEXICANA (N.S.). 39 (may 1990), 1–18. DOI:https://doi.org/10.21829/azm.1990.37391690.