1. Abe, S., Ebizuka, N., Watanabe, J., Murayama, H.,and Ohtsuka, K.: 2000, Meteorit. Planet. Sci.,in press.
2. Borovielca, J.: 1994, Planet. Sp. Sci.
42, 145–150.
3. Borovieka, J. and Betlem, H.: 1997, Planet. Sp. Sci.
45, 563–575.
4. Borovieka, J. and Boeek, J.: 1995, Earth, Moon, Planets
71, 237–244.
5. Borovicka, J. and Majden, E.P.: 1998, J. R. Astron. Soc. Canada
92, 153–156.