“…Other effective methods for solving (1.1) have been presented, among them qualocation methods (see Chandler & Sloan, 1990;Sloan & Burn, 1992;Sarane & Sloan, 1992, for smooth curves and Elschner & Graham, 1994, for curves with corners). Another efficient method for piecewise analytic curves was developed in Hough (1990), where a very elaborate program package was also given.…”