1. Mazurov V. D., “Groups with prescribed spectrum,” Izv. Ural. Gos. Univ. Mat. Mekh., 7, No. 36, 119–138 (2005).
2. Alekseeva O. A. and Kondrat’ev A. S., “On recognition by the set of element orders of the group E 8(q),” Ukrain. Mat. Zh., 54, No. 7, 998–1003 (2002).
3. The Kourovka Notebook: Unsolved Problems in Group Theory, 16th ed., Institute of Mathematics, Novosibirsk (2006).
4. Vasil’ev A. V., “On connection between the structure of a finite group and the properties of its prime graph,” Siberian Math. J., 46, No. 3, 396–404 (2005).
5. Shi W. and Tang C. Y., “A characterization of some finite orthogonal simple groups,” Progr. Natur. Sci., 7, No. 2, 155–162 (1997).