1. J. Nečas, Les Méthodes Directes en Théorie des Équations Élliptiques, Masson/Academia, Paris/Prague, 1967.
2. A. Cialdea, Elastostatics with non absolutely continuous data, J. Elasticity, 23:13–51, 1990.
3. G. Duvant and J.L. Lions, Inequalities in Mechanics and Physics, Grundlehren Math. Wiss., Vol. 219, Springer- Verlag, Berlin, Heidelberg, 1976.
4. E.B. Fabes, M. Jodeit Jr., and N.M. Rivière, Potential techniques for boundary value problems on C1 domains, Acta Math., 141:165–185, 1978.
5. G. Fichera, Sull’esistenza e sul calcolo delle soluzioni dei problemi al contorno, relativi all’equilibrio di un corpo elastico, Ann. Sc. Norm. Super. Pisa, Sci. Fis. Mat., III Ser., 4:35–99, 1950.