1. Relaxation Methods in Engineering Science;Southwell,1940
2. Convergence rates of iterative treatments of partial differential equations;Frankel;Mathematical Tables and Other Aids to Computation,1950
3. Über eine neue Methode zur Lösung gewisser Variationsprobleme der mathematischen Physik;Ritz;Journal für die reine und angewandte Mathematik,1909
4. Variational methods for the solution of problems of equilibrium and vibrations;Courant;Bull. Amer. Math. Soc,1943
5. The finite element method in plane stress analysis;Clough;American Society of Civil Engineers second Conference on Electronic Computation,1960