%0 Journal Article %A Vyšín, Vratislav %A Janků, Vladimír %T Fluctuation in the system with negative absolute temperatures %J Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica %D 1966 %P 167-170 %V 07 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/AUPO_1966__7_1_a13/ %G en %F AUPO_1966__7_1_a13