On -d 2 dx 2 +V where V has infinitely many “bumps”
Annales de l'I.H.P. Physique théorique, Tome 38 (1983) no. 1, pp. 7-13. 
@article{AIHPA_1983__38_1_7_0,
     author = {Klaus, M.},
     title = {On $- \frac{d^2}{dx^2} + V$ where $V$ has infinitely many {\textquotedblleft}bumps{\textquotedblright}},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {7--13},
     publisher = {Gauthier-Villars},
     volume = {38},
     number = {1},
     year = {1983},
     mrnumber = {700696},
     zbl = {0527.47032},
     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1983__38_1_7_0/}
}
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Klaus, M. On $- \frac{d^2}{dx^2} + V$ where $V$ has infinitely many “bumps”. Annales de l'I.H.P. Physique théorique, Tome 38 (1983) no. 1, pp. 7-13. http://www.numdam.org/item/AIHPA_1983__38_1_7_0/

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