Schulze, Corinna, and Andreas Schmidt-Rhaesa. “The Architecture of the Nervous System of Echiniscus Testudo (Echiniscoidea, Heterotardigrada)”. Journal of Limnology, vol. 72, no. s1, Mar. 2013, p. e6, doi:10.4081/jlimnol.2013.s1.e6.