YeleykoYa. I., and ShurenkovV. M. 1996. “Asymptotic Representation of the Perron Root of a Matrix-Valued Stochastic Evolution”. Ukrains’kyi Matematychnyi Zhurnal 48 (1), 35-43. https://umj.imath.kiev.ua/index.php/umj/article/view/5360.