@Article{DT039,
  title = {Quasiparticle band gaps for ultrathin GaAs/AlAs(001)
           superlattices},
  author = {Zhang, S. B. and Hybertsen, Mark S. and
            Cohen, Marvin L. and Louie, Steven G. and Tomanek, D.},
  journal = {Phys. Rev. Lett.},
  volume = {63},
  number = {14},
  pages = {1495--1498},
  year = {1989},
  month = {Oct},
  url = {http://dx.doi.org/10.1103/PhysRevLett.63.1495}
  doi = {10.1103/PhysRevLett.63.1495},
  publisher = {American Physical Society}
}