Schmelzle, Sebastian, Lukas Helfen, Roy A. Norton, and Michael Heethoff. “The Ptychoid Defensive Mechanism in Euphthiracaroidea (Acari: Oribatida): A Comparison of Exoskeletal Elements”. SOIL ORGANISMS 80, no. 2 (October 1, 2008): 233. Accessed May 4, 2024. https://soil-organisms.org/index.php/SO/article/view/21.