1. A measure-theoretic approach to higher codimension mean curvature flows;Ambrosio;Annali della Scuola Normale Superiore di Pisa. Classe di Scienze (4),1997
2. Liouville-type theorems for biharmonic maps between Riemannian manifolds;Baird;Advances in Calculus of Variations,2010
3. On the singular set of stationary harmonic maps
4. Bredon G. E. Introduction to Compact Transformation Groups. Pure and Applied Mathematics 46. New York: Academic Press, 1972.
5. Cooper M. K. “Equivariant polyharmonic maps.” (2014): preprint, arXiv:1309.2330 [math.AP].