1. M. Costabel. An inverse for the Gohberg-Krupnik symbol map.Proc. Roy. Soc. Edinburg, 1980.
2. Ronald G. Douglas.Banach Algebra Techniques in Operator Theory. Academic Press, New York, 1972.
3. I. M. Gelfand and G. E. Shilov.Generalized Functions. Volume 1: Properties and Operations. Academic Press, New York, 1964.
4. I. Gohberg and N. Krupnik. On the algebra generated by one-dimensional singular integral operators with piece-wise continuous coefficients.Funct. Analysis Appl., 4(3):193?201, 1970.
5. I. S. Gradshteyn and I. M. Ryzhik.Tables of Integrals, Series, and Products. Academic Press, New York, 1980.