@article{DOCMA_2016__21__a14,
     author = {M\"uller, David},
     title = {Minimax principles, {Hardy-Dirac} inequalities, and operator cores for two and three dimensional {Coulomb-Dirac} operators},
     journal = {Documenta mathematica},
     pages = {1151--1169},
     publisher = {mathdoc},
     volume = {21},
     year = {2016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DOCMA_2016__21__a14/}
}