Shkilnyak, Stepan. “Varieties of Pure First-Order Logics of Partial Quasiary Predicates”. Bulletin of Taras Shevchenko National University of Kyiv. Physics and Mathematics, vol. 79, no. 2, Jan. 2025, pp. 80-88, https://doi.org/10.17721/1812-5409.2024/2.13.