@article{AIHPA_1990__52_4_303_0,
     author = {Helffer, B. and Sj\"ostrand, J.},
     title = {On diamagnetism and de {Haas-van} {Alphen} effect},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {303--375},
     publisher = {Gauthier-Villars},
     volume = {52},
     number = {4},
     year = {1990},
     mrnumber = {1062904},
     zbl = {0715.35070},
     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1990__52_4_303_0/}
}