Boichuk , A. A., & Zhuravlev , V. F. (2020). Solvability criterion of linear boundary-value problems for integro-differential Fredholm equations with a degenerate kernel in Banach spaces. Ukrains’kyi Matematychnyi Zhurnal, 72(11), 1469-1486. https://doi.org/10.37863/umzh.v72i11.2322