1. K. Sonoda, K. Hoshino and M. Watabe, J. Phys. Soc. Jpn., 64, 540 (1995).
2. K. Sonoda, F. Shimojo, K. Hoshino and M. Watabe, Surf Rev. and Lett., 3, 329 (1996).
3. K. Sonoda, F. Shimojo, K. Hoshino and M. Watabe, in Structures and Dvnontics of Clusters, (T. Kondou, K. Kaya and A. Terasaki, eds.), p.541, and references therein, Universal Academy Press, Tokyo, Japan (1996).
4. K. Sonoda, F. Shimojo, K. Hoshino and M. Watabe, in Science and Technology of Atomically Engineered Materials, (P. Jena, S. N. Khanna, and B. K. Rao, eds.). p.305, World Scientific (1996).