1. Surface Polaritons: Electromagnetic Waves at Surfaces and Interfaces, Ed. by V. M. Agranovich and D. L. Mills (North-Holland, Amsterdam, 1982; Nauka, Moscow, 1985).
2. N. L. Dmitruk, V. G. Litovchenko, and V. L. Strizhevskiĭ, Surface Polaritons in Semiconductors and Dielectrics (Naukova Dumka, Kiev, 1989) [in Russian].
3. A. D. Boardman and T. Twardowski, J. Opt. Soc. Am. B 5, 523 (1988).
4. K. M. Leung, J. Opt. Soc. Am. B 5, 571 (1988).
5. L. Torner and J. P. Torres, IEEE J. Quantum Electron. 28, 1571 (1992).