D. A. Konkin, R. V. Litvinov, E. S. Parfenova, R. A. A.Rakhim, O. V. Stukach, “Intramode wave packet in a thin left-handed film with the spectrum near the frequency of the zero group velocity”, Kvantovaya Elektronika, 46:11 (2016), 1040–1046 [Quantum Electron., 46:11 (2016), 1040–1046]
