Abutalipova Ш. “Kernel of Triangular Derivation of the Ring of Polynomial of Rank 3”. Bulletin of L.N. Gumilyov Eurasian National University. Mathematics, Computer Science, Mechanics Series, vol. 148, no. 3, Sept. 2024, pp. 18-25, doi:10.32523/bulmathenu.2024/3.2.