VERSITA Central European Science Publishers, Warsaw; http://versita.com, in cooperation with journal's owner -Nicolaus Copernicus University Publishing House, Torun; http://wydawnictwoumk.pl
VERSITA Central European Science Publishers, Warsaw; http://versita.com, in cooperation with journal's owner -Nicolaus Copernicus University Publishing House, Torun; http://wydawnictwoumk.pl