1. S. R. Bell, The Cauchy Transform, Potential Theory, and Conformal Mapping, CRC Press, Boca Raton, 1992.
2. S. R. Bell, Complexity of the classical kernel functions of potential theory, Indiana Univ. Math. J. 44 (1995), 1337–1369.
3. S. R. Bell, Ahlfors maps, the double of a domain, and complexity in potential theory and conformal mapping, J. Analyse Math. 78 (1999), 329–344.
4. S. R. Bell, The Bergman kernel and quadrature domains in the plane, Oper. Theory Adv. Appl. 156 (2005), 35–52.
5. S. R. Bell, Quadrature domains and kernel function zipping, Ark. Mat. 43 (2005), 271–287.