May the Cauchy transform of a non-trivial finite measure vanish on the support of the measure? Tolsa, Xavier, Verdera, Joan (2006) Annales Academiae Scientiarum Fennicae. Mathematica
Modified Gauss-Legendre, Lobatto and Radau cubature formulas for the numerical evaluation of 2-D singular integrals. Theocaris, P.S. (1983) International Journal of Mathematics and Mathematical Sciences