@inproceedings{inproceedings9464b309,
title   = {Geometry and stability of the ' ('ga''as') IND.N'' ('in''as') IND.N' and ' ('ga'P) IND.N'' ('in'P) IND.N' ultrathin superlattices},
author = {Ferraz, A. C. and Figueiredo, S K},
year = {1990},
publisher = {World Scientific},
booktitle   = {Brazilian School of Semiconductors Physics}
}