Poletaev G. S. (1992) “Convolution-type integral equation with two kernels and its abstract analog”, Ukrains’kyi Matematychnyi Zhurnal, 44(8), pp. 1065-1078. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/8035 (Accessed: 24November2024).