- Ransford. Potential theory in the complex plane
- A. C. Ponce. Elliptic PDEs, Measures and Capacities: From the Poisson Equation to Nonlinear Thomas-Fermi Problems
- D. Kraus, O. Roth. Conformal metrics
- D. Kraus, O. Roth. Critical points, the Gauss curvature equation and Blaschke products

Notes on Heins theorem