MartynyukA. A., Miladzhanov V. G., and MuminovM. M. 1996. “Stability of Large-Scale Discrete Systems under Structural Perturbations”. Ukrains’kyi Matematychnyi Zhurnal 48 (10), 1352-62. https://umj.imath.kiev.ua/index.php/umj/article/view/5221.