1. Étude de certains noyaux et théorie des fonctions “spline” en analyse numérique;Atteia,1966
2. Expansions in Eigenfunctions of Self-adjoint Operators;Berezanskij,1968
3. The draftman's and related equations;Birkhoff;J. Approximation Theory,1968
4. Optimale Interpolation mit der Methode von Ritz;Delvos;Z. Angew. Math. Mech.,1975
5. On surface interpolation;Delvos;J. Approximation Theory,1975