Representation Type of Posets and Finite Rank Butler Groups D. Arnold; M. Dugas — 1998 Colloquium Mathematicae
Mixed and nonconforming finite element methods : implementation, postprocessing and error estimates D. N. Arnold; F. Brezzi — 1985 ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique