1. Lectures on Quasiconformal Mappings;Ahlfors,1966
2. Unique extremality;Boz̆in;J. Anal. Math.,1998
3. Quasiconformal Teichmüller Theory;Gardiner,2000
4. Univalent Functions and Teichmuller Space;Lehto,1987
5. Quasiconformal Mappings with Applications to Riemann Surfaces;Li,1988