@article{10_1017_fms_2020_17,
     author = {ANDREAS DEUCHERT and SIMON MAYER and ROBERT SEIRINGER},
     title = {THE {FREE} {ENERGY} {OF} {THE} {TWO-DIMENSIONAL} {DILUTE} {BOSE} {GAS.} {I.} {LOWER} {BOUND}},
     journal = {Forum of Mathematics, Sigma},
     publisher = {mathdoc},
     volume = {8},
     year = {2020},
     doi = {10.1017/fms.2020.17},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/fms.2020.17/}
}