@article{10_4064_sm151_1_3,
     author = {Xiangxing Tao},
     title = {Doubling properties and unique
 continuation at the boundary for elliptic
 operators with singular magnetic fields},
     journal = {Studia Mathematica},
     pages = {31--48},
     publisher = {mathdoc},
     volume = {151},
     number = {1},
     year = {2002},
     doi = {10.4064/sm151-1-3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm151-1-3/}
}