@incollection{JEDP_1993____A16_0,
     author = {Markowich, Peter A. and Mauser, Norbert J. and Poupaud, Fr\'ed\'eric},
     title = {Wigner series and (semi)classical limits with periodic potentials},
     booktitle = {},
     series = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     eid = {16},
     pages = {1--13},
     publisher = {Ecole polytechnique},
     year = {1993},
     mrnumber = {94i:82021},
     zbl = {0807.35139},
     language = {en},
     url = {http://archive.numdam.org/item/JEDP_1993____A16_0/}
}