%0 Journal Article %A Pantoflíček, J. %A Šlechta, J. %T International seminar on elementary excitation processes in crystals %J Acta Universitatis Carolinae. Mathematica et Physica %D 1968 %V 09 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/AUCMP_1968__9_2_a1/ %G en %F AUCMP_1968__9_2_a1