Open invitation to tender, deadline 24.05.2011, for tunnel construction and associated work. Further information, specs and docs from Antonis Kotsonis at GGDE in Athens, tel +30 21064-12810, fax -45088, e-mail ggded6@otenet.gr. Time limit for accessing documents 18.05.2011. Visit http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=105262-2011. 14/11.