1. The following list includes all titles referred to in the text. With minor exceptions, the journal abbreviations follow the usage of the Index of the Mathematical Reviews, Volume 51, No. 7 (June 1976).
2. Sobolev Spaces;Adams,1975
3. Adini, A., Clough, R. W. (1961): Analysis of plate bending by the finite element method, NSF report G. 7337.
4. Lectures on Elliptic Boundary Value Problems;Agmon,1965
5. Analysis of thick and thin shell structures by curved finite elements;Ahmad;Internat. J. Numer. Methods Engrg.,1970