@article{CRMATH_2004__339_5_351_0,
     author = {Djakov, Plamen and Mityagin, Boris},
     title = {Asymptotics of instability zones of {Hill} operators with a two term potential},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {351--354},
     publisher = {Elsevier},
     volume = {339},
     number = {5},
     year = {2004},
     doi = {10.1016/j.crma.2004.06.019},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2004.06.019/}
}