Geodesic
Inverse wave spectral problem with discontinuous wave speed
Žurnal matematičeskoj fiziki, analiza, geometrii, Tome 6 (2010) no. 3, pp. 255-265 Cet article a éte moissonné depuis la source Math-Net.Ru

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The inverse problem for the Sturm–Liouville operator with complex periodic potential and positive discontinuous coefficients on the axis is studied. The main characteristics of the fundamental solutions and the spectrum of the operator are studied. The formulation of the inverse problem and a constructive procedure for its solution are given. The uniqueness theorem of the inverse problem is proven. 
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R. F. Efendiev; H. D. Orudzhev. Inverse wave spectral problem with discontinuous wave speed. Žurnal matematičeskoj fiziki, analiza, geometrii, Tome 6 (2010) no. 3, pp. 255-265. http://geodesic.mathdoc.fr/item/JMAG_2010_6_3_a0/

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