R.B. Iverson, R. Reif; J.Appl. Phys. 62 (1987) 1675
J.F. Gibbons; Semiconductors and Semimetals (Academic Press, New York 1984) vol. 17
J.A. van Vechten, R. Tsu, F.W. Saris, D. Hoonhout; Phys.Lett. 74A (1979) 417
P.M. Fauchet; Scanning Electron Microsc. 2 (1986) 425
S. Roorda, W. C. Sinke; Appl. Surf. Sci. 36 (1989) 588
I. Abdulhadim, R. Beserman, R. Weil; Phys. Rev.B 39 (1989)
J. Solis, J. Siegel, C.N. Afonso, J. Jiménez, C. Garcia; J.Appl. Phys. 82 (1997)
J.E. Griffiths, G.P. Espinosa, J.P. Remeika, J.C. Phillips; Phys. Rev. B 25 (1982) 1272
J. Olivares, P. Martin, A. Rodriguez, J. Sangrador, J. Jiménez, T. Rodriguez; Thin Solid Fims 354 (1999) in the press
J. Olivares, P. Martin, A. Rodriguez, J. Sangrador, J. Jiminez, T. Rodriguez; MRS Fall Meeting (Boston 1999) Symp. E