Raffinement de la borne spectrale d'un faisceau de matrices
Rate of convergence of finite-difference approximations for degenerate linear parabolic equations with and coefficients.
Reconstruction of the right-hand side of the elliptical equation from observation data obtained at the boundary
Reduktionsverfahren für Differenzengleichungen bei Randwertaufgaben II. -Solving Difference Equations for Boundary Value Problems by Reduction Methods II.