@inproceedings{r.1976regularity,
title={Regularity and singularity estimates on hypersurfaces minimizing parametric elliptic variational integrals},
author={R. Schoen, L. Simon, and F. J. Almgren Jr},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203243734973228},
booktitle={Acta Mathematica},
volume={139},
number={1},
pages={217-265},
year={1976},
}
R. Schoen, L. Simon, and F. J. Almgren Jr. Regularity and singularity estimates on hypersurfaces minimizing parametric elliptic variational integrals. 1976. Vol. 139. In Acta Mathematica. pp.217-265. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203243734973228.