[1] G.W.Bryant: Phys. Rey. 1989, 39B, 3145. [2] W.Xue and P.A.Lee: Phys. Rev.,1988, 38B, 3913. [3] V.Kalmeyer and R.B.Laughlin: Phys. Rev., 1987,35B, 9085. [4] X.Chen, J.Zhao and G.Wang: Appl. Phys. Lett.,1994, 65, 2419. [5] J.A.Kubby Y.R.Wang and W.J.Greene: Phys. Rev.Lett., 1990, 65, 2165. [6] J. Tersoff C.Teichert and M.G.Lagally: Phys. Rev.Lett., 1996, 76, 1675. [7] S.Wolfram: Rev. Mod. Phys., 1983, 55, 601. [8] M.Yu Sumeststkii: JETP Lett., 1986, 44, 369. [9] M. Sumetskii: J.Phys. Condens. Matter, 1991, 3,2651. [10] M.Yu Sumestskii: Zh. Eksp. Teor. Fiz., 1988, 94, 7. [11] H.J.De Vega, J.L. Gervais and B.Sakita: Nucl. Phys.,1978, 139B, 20. |