1. Chemical Kinetics of Solids;Schmalzried,1995
2. Magnetically ordered surface oxide on Gd(0001)
3. Chemistry of the Elements;Greenwood,1984
4. O.G. Shpyrko, A. Grigoriev, C. Steimer, P.S. Pershan, B.M. Ocko, M. Deutsch, B. Lin, M. Meron, T. Graber, J. Gebhardt, Phys. Rev. B (2004), accepted for publication