“A Classification of Linear Operators With Minimal Polinomial $f(t) = (t-a)(t-b)$, $a \neq b$, Acting in a Filtered Vector Space”. Neliniini Kolyvannya 3, no. 1 (March 29, 2000): 31–35. Accessed January 22, 2026. https://twinhead.imath.kiev.ua/index.php/nosc/article/view/92.