1. “Earth has another asteroid close call”,Space Today,4, No. 6, 4 (1989).
2. E. Teller, “Commentary on collision of asteroids and comets with the Earth,” Abstr. of Int. Conf. “SPE-94”, Snezhinsk, September 26–30, Part II, 34–35 (1994).
3. V. I. Aref'ev, M. M. Belousov, V. P. Pugachev, and A. M. Frolov, “Nuclear explosions in space for the Earth's protection,”Metronom, No. 3-4, 75–77 (1993).
4. Yu. P. Zakharov, S. A. Nikitin, A. M. Orishich, and A. G. Ponomarenko, “Laboratory simulation on the magnetospheric hazard processes,” Abstr. of Conf. “Hazards due to comets and asteroids,” Tucson, 88–89 (1993).
5. S. A. Nikitin and A. G. Ponomarenko, “Energetic criteria of an artificial magnetosphere formation for space protection explosion conditions,” Abstr. of Int. Conf. “SPE-94”, Snezhinsk, September 26–30, Part I, 82–83 (1994).