Komleva, T. A., A. B. Plotnikov, L. I. Plotnikova, and N. V. Skripnik. “Conditions for the Existence of Basic Solutions of Linear Multivalued Differential Equations”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 73, no. 5, May 2021, pp. 651 -73, doi:10.37863/umzh.v73i5.6356.