@article{MZ_1995__218_4_174738,
     author = {Bernard Helffer and Heinz Siedentop},
     title = {Regularization of atomic {Schr\"odinger} operators with magnetic field.},
     journal = {Mathematische Zeitschrift},
     pages = {427--438},
     publisher = {mathdoc},
     volume = {218},
     number = {4},
     year = {1995},
     zbl = {0826.35103},
     url = {http://geodesic.mathdoc.fr/item/MZ_1995__218_4_174738/}
}