Interaction of a free wave with a semicrystal
Journées équations aux dérivées partielles (1995), article no. 19, 8 p. 
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     title = {Interaction of a free wave with a semicrystal},
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Yu.E. Karpeshina. Interaction of a free wave with a semicrystal. Journées équations aux dérivées partielles (1995), article  no. 19, 8 p. https://proceedings.centre-mersenne.org/item/JEDP_1995____A19_0/

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[3] Yu. E. Karpeshina, Perturbation theory for the Schrödinger operator with a periodic potential, Proceedings of the Steklov Institute of Mathematics, 1991, Issue 3, 109-145. | Zbl