%0 Journal Article %A Zoltán Léka %T Time regularity and functions of the Volterra operator %J Studia Mathematica %D 2014 %P 1-14 %V 220 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4064/sm220-1-1/ %R 10.4064/sm220-1-1 %G en %F 10_4064_sm220_1_1