Babenko, V.F. and Levchenko, D.A. (2012) “Uniformly distributed ridge approximation of some classes of harmonic functions”, Ukrains’kyi Matematychnyi Zhurnal, 64(10), pp. 1426–1431. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/2669 (Accessed: 5 December 2025).