BANDYRSKII, B. I.; MAKAROV, V. L.; ROMANIUK, N. M. Generalization of resonance equations for the Laguerre- and Legendre-type polynomials to the fourth-order equations. Ukrains’kyi Matematychnyi Zhurnal, v. 71, n. 11, p. 1529-1538, 25 Nov. 2019.