@InCollection{Skura:1994,
author
=
"T.Skura",
title
=
"Characterizing propositional logics by formulas",
pages
=
"239--245",
year
=
"1994",
booktitle
=
"Philosophical Logic in Poland ",
editor
=
"ed. Jan Woleński",
publisher
=
"Kluwer Academic Publishers",
address
=
"Dordrecht",
}