Categories Greek Articles Kokkas G., 1999, Elliniki Dikaiosini, 40, p. 690 Post author By Post date November 12, 2013 Juridical needs for validation of copyright and related rights. ← Karagiannis B., 1999, Elliniki Dikaiosini, 1999. p. 541 → Koumandos G., 1994, Elliniki Dikaiosini, 35, p. 1464