1. Arcangeli, R. (1966) Pseudo-solution de l’equation Ax=y, Comptes Rendus des Seances de 1’Academie des Sciences, Paris, Ser. A, 263, 282–285
2. Engl, H.W. (1981) Necessary and sufficient conditions for convergence of regularization methods for solving linear operator eauations of the first kind, Numer.Funct.Analysis and Optim. 3, 201–222
3. Engl, H.W. (1983) Discrepancy principles for Tikhonov regularization of ill-posed problems leading to optimal convergence rates, submitted
4. Engl, H.W. and Neubauer, A. (1984) A variant of Marti’s method for solving ill-posed linear integral equations that leads to optimal convergence rates, submitted
5. Groetsch, C.W. (1979) The parameter choice problem in linear regularization, to appear in M.Z.Nashed (ed.), Ill-nosed problems, theory and practice