BabenkoV. F., BabenkoV. V., and PolishchukM. V. 2015. “On the Optimal Recovery of Integrals of Set-Valued Functions”. Ukrains’kyi Matematychnyi Zhurnal 67 (9), 1163-71. https://umj.imath.kiev.ua/index.php/umj/article/view/2055.