The Copyright of the fonts belongs to the The Department of Mathematics of
the University of the Aegean, Karlobasi, Samos, Greece

If you want to use this font family in commercial work (like in books), 
we strongly request that you include in the Copyright section the fact 
that you are using
"Kerkis (C) Department of Mathematics, University of the Aegean".

"The Kerkis fonts and kerkis.sty are licensed under the LaTeX Project
Public License, version 1.3c or later.  See http://www.latex-project.org/lppl."