The Approximation of Generalized Turning Points by Projection Methods with Superconvergence to the Critical Parameter.
The inverse problem at fixed energy for finite range complex potentials
The numerical treatment of perturbed bifurcation in boundary value problems
The Spectrum of Hill's Equation.
Théorème de Paley-Wiener associé à un opérateur différentiel singulier sur
Two new finite difference methods for computing eigenvalues of a fourth order linear boundary value problem.