Schmelzle, S., Helfen, L., Norton, R. A., & Heethoff, M. (2010). The ptychoid defensive mechanism in Phthiracarus longulus (Acari, Oribatida, Phthiracaroidea): Exoskeletal and muscular elements. SOIL ORGANISMS, 82(2), 253. Retrieved from https://soil-organisms.org/index.php/SO/article/view/231