1. V. I. Matveev, Zh. Éksp. Teor. Fiz. 124, 1023 (2003) [JETP 97, 915 (2003)].
2. M. K. Eseev and V. I. Matveev, Zh. Tekh. Fiz. 78(8), 28 (2008) [Tech. Phys. 53, 985 (2008)].
3. M. K. Eseev and V. I. Matveev, Opt. Spektr. 104, 885 (2008) [Opt. Spectr. 104, 799 (2008)].
4. M. K. Eseev, V. I. Matveev, and N. V. Abikulova, Opt. Spektr. 106, 231 (2009) [Opt. Spectrosc. 106, 198 (2009)].
5. A. Rudenko, Th. Ergler, B. Feuerstein, et al., J. Phys.: Conf. Series 88, 012050 (2007).