1. M. Nikl, J. A. Mareš, E. Mihóková, A. Beitlerová, K. Blazek, J. Jindra
    Energy Transfer in CeF3 Single Crystals.
    Sol. St. Comm. 87, 185 (1993).
  2. J. A. Mareš, M. Nikl, G. Boulon
    Identification of trace impurities in pure and doped YAlO3 and Y3Al5O12 crystals by their fluorescence and by EMA method.
    Czech J. Phys. B43, 687 (1993).