Author: Kratz, Werner

Kratz, Werner: Sturm-Liouville difference equations and banded matrices. (English). Archivum Mathematicum, vol. 36 (2000), issue 5, pp. 499-505
Kratz, Werner: Quadratic functionals: positivity, oscillation, Rayleigh's principle. (English). Archivum Mathematicum, vol. 34 (1998), issue 1, pp. 143-151
Kratz, Werner: Asymptotic behaviour of Riccati's differential equation associated with self-adjoint scalar equations of even order. (English). Czechoslovak Mathematical Journal, vol. 38 (1988), issue 2, pp. 351-365