BARTELS, Paul J., and Diane R. NELSON. “An Evaluation of Species Richness Estimators for Tardigrades of the Great Smoky Mountains National Park, Tennessee and North Carolina, USA”. Journal of Limnology 66, no. s1 (September 1, 2007): 104-110. Accessed May 10, 2021. https://jlimnol.it/index.php/jlimnol/article/view/jlimnol.2007.s1.104.