Kováč, Ľubomír, and V. Papáč. “Revision of the Genus Neelus Folsom, 1896 (Collembola, Neelida) With the Description of Two New Troglobiotic Species from Europe”. Zootaxa, vol. 2663, no. 1, Nov. 2010, pp. 36–52, doi:10.11646/zootaxa.2663.1.2.