1. Davis, P. J.: On the numerical integration of periodic analytic functions. Symposium On Numerical Approximation, Ed. R. Langer. Madison: The University of Wisconsin Press 1959
2. Garrick, I. E.: Conformal mapping in aerodynamics with emphasis on the method of successive conjugates. Nat. Bur. Standards Appl. Math. Ser.18, 137–147.
3. Willers, P. A.: Methoden der praktischen Analysis. Berlin: de Gruyter 1950.