@article{BSMF_2008__136_2_167_0,
     author = {Thomann, Laurent},
     title = {The {WKB} method and geometric instability for nonlinear {Schr\"odinger} equations on surfaces},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {167--193},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {136},
     number = {2},
     year = {2008},
     doi = {10.24033/bsmf.2553},
     mrnumber = {2415340},
     zbl = {1161.35050},
     language = {en},
     url = {http://www.numdam.org/articles/10.24033/bsmf.2553/}
}