1. A. Šimůnek, J. Vackář
    Hardness of Covalent and Ionic Crystals: First-Principle Calculations
    Physical Review Letters 96 (2006) 085501/1-085501/4.
  2. O. Šipr, A. Šimůnek, J. Vackář, G. Daba, F. Rocca
    Connection between spectral features of B K edge XANES of minerals and the local structure
    Physics and Chemistry of Glasses 47 (2006) 412-418.