Girko, V. L. “Asymptotically Normal Estimates of Solutions of a System of Algebraic Equations. I ”. Ukrains’kyi Matematychnyi Zhurnal 42, no. 6 (June 19, 1990): 755–762. Accessed December 6, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/8831.