@incollection{JEDP_1996____A4_0,
     author = {Buslaev, Vladimir and Fedotov, Alexander},
     title = {Spectral properties of the monodromy matrix for {Harper} equation},
     booktitle = {},
     series = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     eid = {4},
     pages = {1--11},
     publisher = {Ecole polytechnique},
     year = {1996},
     mrnumber = {98m:81032},
     zbl = {0874.39006},
     language = {en},
     url = {http://archive.numdam.org/item/JEDP_1996____A4_0/}
}