[1]
K. A. Khachatryan and H. S. Petrosyan, “On bounded solutions of a class of nonlinear integral equations on the plane and the Urysohn equation in a quadrant of the plane”, Ukr. Mat. Zhurn., vol. 73, no. 5, pp. 695–711, May 2021, doi: 10.37863/umzh.v73i5.6541.