• [Wiki] https://en.wikipedia.org/wiki/Clithon_retropictum.
• [KobaIwas2002] Kobayashi, S. and Iwasaki, K. (2002). Distribution and spatio-temporal variation in the population structure of the fluvial neritid gastropod Clithon retropictus. Benthos Research, 57(2):91--101.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.
• [ShigKato2001] Shigemiya, Y. and Kato, M. (2001). Age distribution, growth, and lifetime copulation frequency of a freshwater snail, Clithon retropictus (Neritidae). Popul Ecol, 43:133--140.