Publisher
Springer Science and Business Media LLC
Reference14 articles.
1. M. Nakamura:Nuovo Cimento A,85, 337 (1985).
2. N. Nakamura, H. Minowa andN. Moshima:Nuovo Cimento A,98, 73 (1987).
3. M. Nakamura, H. Minowa andN. Mishima:Prog. Theor. Phys.,79, 321 (1988).
4. M. B. Green, J. H. Schwarz andE. Witten:Superstring Theory, Vol.1,Introduction (Cambrige University Press, Cambridge, Mass., 1987).
5. C. Lovelace:Phys. Lett. B,135, 75 (1984).