On the correct formulation of a multidimensional problem for strictly hyperbolic equations of higher order

S. Kharibegashvili
1994 Georgian Mathematical Journal  
A theorem of the unique solvability of the first boundary value problem in the Sobolev weighted spaces is proved for higherorder strictly hyperbolic systems in the conic domain with special orientation.
doi:10.1007/bf02254728 fatcat:6mnxmodkebacpcz6j3gc2eei6e