%0 Journal Article %A Aczél, J. %A Daróczy, Z. %T A mixed theory of information. I : symmetric, recursive and measurable entropies of randomized systems of events %J RAIRO. Informatique théorique %D 1978 %P 149-155 %V 12 %N 2 %I EDP-Sciences %U http://www.numdam.org/item/ITA_1978__12_2_149_0/ %G en %F ITA_1978__12_2_149_0