GREECE,
UNIVERSITY OF IOANNINA

GREECE,
UNIVERSITY OF MACEDONIA

HUNGARY,
SZENT ISTVAN UNIVERSITY

ITALY,
UNIVERSITY OF BARI, ALDO MORO

ITALY,
UNIVERSITÀ POLITECNICA DELLE MARCHE

LITHUANIA,
VILNIUS UNIVERSITY

SLOVAKIA,
UNIVERSITY OF ZILINA

TURKEY,
BOĞAZIÇI UNIVERSITY

UKRAINE,
POLTAVA UNIVERSITY OF ECONOMICS AND TRADE

UKRAINE,
IVAN FRANKO NATIONAL UNIVERSITY OF LVIV