Incremental unknowns on nonuniform meshes J.-P. Chehab; A. Miranville — 1998 ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique
Integral representation of the solutions to Heun's biconfluent equation. Belmehdi, S.; Chehab, J.-P. — 2004 Abstract and Applied Analysis