1. B. A. Knyazev and A. V. Kuz’min, Vestnik Novosib. Gosud. Univ. Ser. Fiz., 2, No. 1, 108–122 (2007).
2. S. A. Tretyakov and C. R. Simovski, J. Electromagn. Waves Applic., 17, No. 1, 131–145 (2003).
3. V. M. Babich and A. V. Kuznetsov, Zapiski Nauchn. Semin. Sankt-Peterb. Otd. Mathemat. Inst. Im. V. A. Steklova Ross. Akad. Nauk, 324, 5–19 (2005).
4. V. V. Fisanov, Izv. Vyssh. Uchebn. Zaved. Radioelektron., 13, No. 1, 53–58 (1970).
5. A. I. Timoshenko and V. V. Fisanov, Izv. Vyssh. Uchebn. Zaved. Fiz., 36, No. 2, 115–117 (1993).