@article{DT020,
   Author = {Tomanek, D.},
   Title = {Simple Criterion for the Reconstruction of Clean and
            Adsorbate-Covered Metal Surfaces},
   Journal = {Phys. Lett. A},
   Volume = {113},
   Number = {8},
   Pages = {445--448},
   Month = {Jan},
   Year = {1986} }