Arsirii, A. V., and A. V. Plotnikov. “Systems of Control over Set-Valued Trajectories With Terminal Quality Criterion”. Ukrains’kyi Matematychnyi Zhurnal 61, no. 8 (August 25, 2009): 1142-1147. Accessed February 9, 2023. https://umj.imath.kiev.ua/index.php/umj/article/view/3086.