1. Aufgabe 41;Rado;Jahresbericht der Deutschen Mathematiker Vereinigung,1926
2. Transformation of three-dimensional regions onto rectangular regions by elliptic systems;Mastin;Numerische Mathematik,1978
3. On harmonic maps;Liao,1991
4. On the minimum number of domains in which the nodal lines of spherical harmonics divide the sphere;Lewy;Comm. PDE's,1977
5. An example of a harmonic map between Euclidean balls;Melas,1993