Final-boundary value problem in the non-classical treatment for a sixth   order pseudoparabolic equation
  For this equation we consider a final-boundary value problem with non-classical conditions not requiring agreement conditions. Equivalence of these conditions with the classic boundary condition is substantiated in the case if the solution of the stated problem is sought in S.L.Sobolev anisotropic space. 
Ilgar G. Mamedov
math.AP