MartуnуukА. А., and KоzubоvskауaI. G. “On Sufficient Conditions of Stability for Systems With Constantly Acting Disturbances”. Ukrains’kyi Matematychnyi Zhurnal 23, no. 3 (April 26, 1971): 405-410. Accessed October 6, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/8571.