On a class of initial-boundary value problems in a domain with boundary containing isolated points
On a class of mixed boundary value problems for linear hyperbolic equations
On a Darboux problem for a third-order hyperbolic equation with multiple characteristics.
On periodic solutions of some equations of mathematical physics
On the correct formulation of a multidimensional problem for strictly hyperbolic equations of higher order.
On the correctness of the Dirichlet problem in a characteristic rectangle for fourth order linear hyperbolic equations.
On the strongly damped wave equation with nonlinear damping and source terms.