@inproceedings{gregory2004the, title={The biharmonic Neumann problem in Lipschitz domains}, author={Gregory C. Verchota}, url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203346852366666}, booktitle={Acta Mathematica}, volume={194}, number={2}, pages={217-279}, year={2004}, }