Schmelz, Rüdiger M., and Rut Collado. “‚Cejkaian tubules‘ in the Posterior Midgut of Terrestrial Enchytraeidae (Oligochaeta)”. Soil Organisms, vol. 85, no. 2, Feb. 2024, pp. 113–122, https://soil-organisms.org/index.php/SO/article/view/377.