[1]
Guidetti, R. and Bertolani, R. 2011.

Phylum Tardigrada Doyère, 1840. In: Zhang, Z.-Q. (Ed.) Animal biodiversity: An outline of higher-level classification and survey of taxonomic richness

. Zootaxa. 3148, 1 (Dec. 2011), 96–97. DOI:https://doi.org/10.11646/zootaxa.3148.1.12.