@article{ASENS_1991_4_24_2_215_0,
     author = {Siedentop, Heinz and Weikard, Rudi},
     title = {A new phase space localization technique with application to the sum of negative eigenvalues of {Schr\"odinger} operators},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {215--225},
     publisher = {Elsevier},
     volume = {Ser. 4, 24},
     number = {2},
     year = {1991},
     doi = {10.24033/asens.1626},
     mrnumber = {92d:81152},
     zbl = {0762.47022},
     language = {en},
     url = {http://www.numdam.org/articles/10.24033/asens.1626/}
}