@article {TaoZh2005,
 author="Xiangxing Tao and Songyan Zhang",
 title={Boundary unique continuation theorems under zero Neumann boundary conditions},
 journal="Bull. Austral. Math. Soc.",
 fjournal={Bulletin of the Australian Mathematical Society},
 volume="72",
 year="2005",
 number="1",
 pages="67--85",
 issn="0004-9727",
 coden="ALNBAB",
 language="English",
 date="9th February, 2005",
 classmath="35B60, 35R05, 31B25",
 publisher={AMPAI, Australian Mathematical Society},
 MRnumber="MR2162295",
 ZBLnumber="02212187",
 url="http://www.austms.org.au/Publ/Bulletin/V72P1/721-5042-TaoZh/index.shtml",
 acknowledgement={The work of the first author is supported by National Nature Science Foundation of China (No.10471069), and Zhejiang Provincial Natural Science Foundation of China (No.102066). The second author is supported by Scientific Research Fund of Zhejiang Provincial Education Department (No.20040962) and Doctoral Foundation of Ningbo City (No.2004A610003).},
 abstract={ Let $u$ be a solution to a second order elliptic equation with singular potentials belonging to the Kato--Fefferman--Phong's class in Lipschitz domains. We prove the boundary unique continuation theorems and the doubling properties for $u^2$ near the boundary under the zero Neumann boundary condition. }
}