@article{MAN_1991__289_4_164781,
     author = {Volker Vogelsang},
     title = {On the strong unique continuation prinicple for inequalities of {Maxwell} type.},
     journal = {Mathematische Annalen},
     pages = {285--296},
     year = {1991},
     volume = {289},
     number = {4},
     zbl = {0703.35028},
     url = {http://geodesic.mathdoc.fr/item/MAN_1991__289_4_164781/}
}