Kreinovich, V., Ceberio, M. and Brefort, Q. (2015) “In Category of Sets and Relations, It Is Possible to Describe Functions in Purely Category Terms”, Eurasian Mathematical Journal, 6(2), pp. 90–94. Available at: https://emj.enu.kz/index.php/main/article/view/611 (Accessed: 31 October 2025).