@incollection{JEDP_1991____A11_0,
     author = {B\"attig, Daniel and Guillot, Jean-Claude},
     title = {The {Fermi} surface for the discretized {Maxwell} equations},
     booktitle = {},
     series = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     eid = {11},
     pages = {1--6},
     publisher = {Ecole polytechnique},
     year = {1991},
     zbl = {0752.35071},
     language = {en},
     url = {http://archive.numdam.org/item/JEDP_1991____A11_0/}
}