Malyshev К. I. “Direct Methods for the Approximate Solution of Systems of Singular Integral Equations in the Case of Nonnegative Partial Indices”. Ukrains’kyi Matematychnyi Zhurnal 51, no. 12 (December 25, 1999): 1638–1644. Accessed April 11, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/4768.