Hoch, Hannelore. 2005. “On the Identity of the Type Species of the Planthopper Genus Oliarus Stal, 1862, Oliarus Walkeri (Stal, 1859) (Hemiptera: Cixiidae)”. Zootaxa 1056 (1). Auckland, New Zealand:53–60. https://doi.org/10.11646/zootaxa.1056.1.4.