Geodesic
Spectral function approach to the double wedges diffraction problem
Zapiski Nauchnykh Seminarov POMI, Mathematical problems in the theory of wave propagation. Part 34, Tome 324 (2005), pp. 61-76 Cet article a éte moissonné depuis la source Math-Net.Ru

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In this work the problem of diffraction by two wedges with ideal boundary conditions (Dirichlet or Neumann) is considered. Uniqueness is obtained in a general setting. Spectral functions approach turns out to be applicable under certain “narrowness” geometrical assumptions and leads to the existence of a solution. 
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     author = {V. V. Kamotskii},
     title = {Spectral function approach to the double wedges diffraction problem},
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}
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V. V. Kamotskii. Spectral function approach to the double wedges diffraction problem. Zapiski Nauchnykh Seminarov POMI, Mathematical problems in the theory of wave propagation. Part 34, Tome 324 (2005), pp. 61-76. http://geodesic.mathdoc.fr/item/ZNSL_2005_324_a3/

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[3] V. V. Kamotskii, “O padenii ploskoi volny na uprugii klin pod kriticheskim uglom”, Algebra i Analiz, 15:3 (2003), 145–169 | MR | Zbl