@article{article785747bb,
title   = {The role of generalised gradient approximation in structural and electronic properties of bulk and surface of 'beta'-GaN and GaAs},
author = {Miotto, R. and Srivastava, G. P. and Ferraz, A. C.},
year = {1999},
doi = {10.1016/s0039-6028(99)00109-0},
journal   = {Surface Science}
}