BandyrskiiB. I., MakarovV. L., and RomaniukN. M. 2019. “Generalization of Resonance Equations for the Laguerre- and Legendre-Type Polynomials to the Fourth-Order Equations”. Ukrains’kyi Matematychnyi Zhurnal 71 (11), 1529-38. https://umj.imath.kiev.ua/index.php/umj/article/view/1533.