“Non-additive Lie centralizer of strictly upper triangular matrices: doi:10.17398/2605-5686.34.1.77” (2019) Extracta Mathematicae, 34(1), p. 77–83. Available at: https://revista-em.unex.es/index.php/EM/article/view/2605-5686.34.1.77 (Accessed: 22 December 2024).