@article{AIF_2004__54_5_1423_0,
     author = {Colin de Verdi\`ere, Yves},
     title = {The level crossing problem in semi-classical analysis. {II.} {The} hermitian case},
     journal = {Annales de l'Institut Fourier},
     pages = {1423--1441},
     publisher = {Association des Annales de l{\textquoteright}institut Fourier},
     volume = {54},
     number = {5},
     year = {2004},
     doi = {10.5802/aif.2054},
     mrnumber = {2127853},
     zbl = {1067.35162},
     language = {en},
     url = {http://archive.numdam.org/articles/10.5802/aif.2054/}
}