1. V. Bérard, Thèse, en préparation
2. A regularity theory of biharmonic maps;Chang;Commun. Pure Appl. Math. (9),1999
3. C. Fefferman, C.R. Graham, Conformal Invariants, The Mathematical Heritage of Élie Cartan, Lyon, 1984, Astérisque, 1985, Numéro Hors Serie, pp. 95–116
4. Volume and area renormalizations for conformally compact Einstein metrics;Graham;Rend. Circ. Mat. Palermo, Ser. II,2000
5. Conformally invariant powers of the Laplacian, I: Existence;Graham;J. London Math. Soc. (2),1987