@article{10_1017_fms_2021_22,
     author = {Lea Bo{\ss}mann and S\"oren Petrat and Robert Seiringer},
     title = {Asymptotic expansion of low-energy excitations for weakly interacting bosons},
     journal = {Forum of Mathematics, Sigma},
     publisher = {mathdoc},
     volume = {9},
     year = {2021},
     doi = {10.1017/fms.2021.22},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/fms.2021.22/}
}