Samoilenko, Y.S., Shulman, V.S. and Turowska, L.B. (1996) “Semilinear relations and their $*$-representations”, Methods of Functional Analysis and Topology, 2(1), pp. 55–111. Available at: https://zen.imath.kiev.ua/index.php/mfat/article/view/10 (Accessed: 19 December 2025).