Structural and compositional reversible phase transitions on low-index surfacesU. Starke, J. Schardt, W. Weiss, W. Meier, C. Polop, P. L. de Andres and K. HeinzEurophys. Lett., 56 6 (2001) 822-828DOI: https://doi.org/10.1209/epl/i2001-00593-6