1. Operator Theory: Advances and Appl;A. Ben-Artzi,1988
2. A. Böttcher, B. Silbermann, Analysis of Toeplitz Operators.-Akademie-Verlag, Berlin 1989 and Springer-Verlag, Berlin, Heidelberg, New-York 1990.
3. A. Böttcher, Yu. Karlovich, V. Rabinovich, The method of limit operators for the theory of one-dimensional singular integral operators with slowly oscillating data.-To appear in Operator Theory, 2000.
4. J. Dixmier, LesC *-algébres et leurs représentations.-Paris, Gauthier-Villars Éditeur, 1969.
5. R. G. Douglas, On the invertibility of a class of Toeplitz operators on the quarter plane.-Ind. Univ. Math. J.21(1972), 1031?1036.