1. V. M. Babich, M. A. Lyalinov, and V. E. Grikurov, Diffraction Theory: The Sommerfeld–Malyuzhinets Technique, Alpha Science, Oxford (2008).
2. L. P. Castro and D. Kapanadze, “Dirichlet–Neumann impedance boundary-value problems arising in rectangular wedge diffraction problems,” Proc. Am. Math. Soc., 136, 2113–2123 (2008).
3. L. P. Castro and D. Kapanadze, “Wave diffraction by a 45 degree wedge sector with Dirichlet and Neumann boundary conditions,” Math. Comput. Modelling, 48, No. 1/2, 114–121 (2008).
4. L. P. Castro and D. Kapanadze, “Wave diffraction by a 270 degrees wedge sector with Dirichlet, Neumann and impedance boundary conditions,” Proc. A. Razmadze Math. Inst., 155, 96–99 (2011).
5. L. P. Castro, F.-O. Speck, and F. S. Teixeira, “On a class of wedge diffraction problems posted by Erhard Meister,” Oper. Theory Adv. Appl., 147, 213–240 (2004).