[1]
Yehorchenko I.A. and VorobyovaA.I. 2022. Conditional and hidden infinite-dimensional symmetries of wave equations. Ukrains’kyi Matematychnyi Zhurnal. 74, 3 (Apr. 2022), 335-341. DOI:https://doi.org/10.37863/umzh.v74i3.7035.