BoichukO. A., ChuikoS. M., and KuzminaV. O. “Nonlinear Integrodifferential Boundary Value Problems With Deviating Argument Unsolved With Respect to the Derivative”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 74, no. 9, Nov. 2022, pp. 1170 -81, doi:10.37863/umzh.v74i9.6707.