@article{Feller_2009, title={Boundary-value problems for the wave equation with Lévy Laplacian in the Gâteaux class}, volume={61}, url={https://umj.imath.kiev.ua/index.php/umj/article/view/3122}, abstractNote={We present the solutions of the initial-value problem in the entire space and the solutions of the boundary-value and initial-boundary-value problems for the wave equation $$\frac{∂^2U(t,x)}{∂x^2} = Δ_LU(t,x)$$ with infinite-dimensional Lévy Laplacian $Δ_L$ in the class of Gâteaux functions.}, number={11}, journal={Ukrains’kyi Matematychnyi Zhurnal}, author={Feller, M. N.}, year={2009}, month={Nov.}, pages={1564-1574} }