@incollection{JEDP_1994____A7_0,
     author = {Nenciu, Gheorghe},
     title = {On exponential decay of solutions of {Schr\"odinger} and {Dirac} equations : bounds of eigenfunctions corresponding to energies in the gaps of essential spectrum},
     booktitle = {},
     series = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     eid = {7},
     pages = {1--10},
     publisher = {Ecole polytechnique},
     year = {1994},
     zbl = {0948.35506},
     language = {en},
     url = {http://www.numdam.org/item/JEDP_1994____A7_0/}
}