1. Inversion Theory and Conformal Mapping
2. Riemannian Geometry
3. Dubrovin B, Fomenko A, Novikov S. Modern geometry—methods and applications. Part I. 2nd ed. Vol. 93, Graduate texts in mathematics. New York: Springer-Verlag; 1992. The geometry of surfaces, transformation groups, and fields, Translated from the Russian by Robert G. Burns.
4. On Differentiable Mappings
5. Liouville’s theorem on conformal mapping;Flanders H.;J Math Mech,1966