Approximation by finite element functions using local regularization Ph. Clément — 1975 ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique
Perturbation Theory for Dual Semigroups. I. The Sun-Reflexive Case. Ph. Clément; O. Diekmann; M. Gyllenberg; H.J.A.M. Heijmans; H.R. Thieme — 1987 Mathematische Annalen
A Hille-Yosida theorem for a class of weakly * continuous semigroups. Ph. Clément; O. Diekmann; M. Gyllenberg; H.J.A.M. Heijmans; H.R. Thieme — 1989 Semigroup forum
On a variational problem for an infinite particle system in a random medium. Ph. Clément; A. Greven; J.-B. Baillon — 1994 Journal für die reine und angewandte Mathematik