1. Agrillo, C., & Bisazza, A. (2018). Understanding the origin of number sense: A review of fish studies. Philosophical Transactions of the Royal Society B, 373,(1740):20160511. https://doi.org/10.1098/rst.2016.0511
2. Aronson, L. R. (1951). Orientation and jumping behavior in the gobiid fish Bathygobius soporator. American Museum of Natural History City New York, 1486, 1–22.
3. Aronson, L. R. (1951). Orientation and jumping behavior in the gobiid fish Bathygobius soporator. American Museum of Natural History City New York, 1486, 20–21.
4. Balcombe, J. (2016). What a fish knows. The inner lives of our underwater cousins. Scientific American.
5. Baumann, H., & Uhlig, P. (1974). Kein Platz für wilde Menschen. Goverts Krüger Stahlberg Verlags GmbH, Stuttgart.