Table of contents : Introduction....Pages 1-12 Geometric considerations....Pages 12-18 Conformal mappings....Pages 18-38 Existence theorems for harmonic maps between surfaces....Pages 38-53 Uniqueness theorems....Pages 54-65 A-priori C 1,α -estimates....Pages 65-77 A-priori estimates from below for the functional determinant of harmonic diffeomorphisms....Pages 77-86 The existence of harmonic diffeomorphisms which solve a Dirichlet problem....Pages 86-90 C 1, α - a priori estimates for arbitrary domains. Non-variational existence proofs....Pages 90-98 Harmonic coordinates. C 2, α - a - priori estimates for harmonic maps....Pages 98-105 The existence of harmonic diffeomorphisms between surfaces....Pages 106-112 Applications of harmonic maps between surfaces....Pages 112-126