## Harmonic coordinates on Riemannian manifolds

I'm trying to read the paper of Jost and Karcher on the existence of harmonic coordinates on a ball whose size only depend on the injectivity radius and a two sided bound on the curvature.

Unfortunately, my german skills are quite low and make the reading really slow. Does there exist another place to find this proof (in English or French) ?

Thanks

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 You ever tried to ask him personally? mis.mpg.de/de/jjost/index.html He is a very nice person! – Orbicular Dec 7 2010 at 16:39 Although it's probably too late... I learned a proof from M. Anderson's paper, Convergence and rigidity of manifolds under Ricci curvature bounds, Invent. Math., 1990. (Main Lemma 2.2) – Chih-Wei Chen Sep 26 2011 at 1:33