@article{oai:repository.dl.itc.u-tokyo.ac.jp:00040201, author = {Duzaar, Frank and Gastel, Andreas and Grotowski, Joseph F}, issue = {3}, journal = {Journal of mathematical sciences, the University of Tokyo}, month = {}, note = {application/pdf}, pages = {463--499}, title = {Optimal Partial Regularity for Nonlinear Elliptic Systems of Higher Order}, volume = {8}, year = {2001} }