1. N. K. Vol’nov, Peroxide Compounds of Alkaline Metals (Nauka, Moscow, 1980) [in Russian].
2. W. Hesse, M. Jansen, and W. Schnick, Progr. Solid State Chem. 19(1), 47 (1989).
3. M. Jancen and H. Nuss, ZAACA 633, 1307 (2007).
4. H. Y. Wu, H. Zhang, X. L. Cheng, and L. C. Cai, Phys. Lett. 360, 352 (2006).
5. Z. K. Nikitina and V. Ya. Rosolovskii, Zh. Neorg. Khim. 42, 1252 (1997) [Russ. J. Inorg. Chem. 42, 1130 (1997)].