Estimation of the Energy Potential of the Euripus' Gulf Tidal Stream Using Channel Sea-surface Slope. - Aphrodite Ktena; Christos Manasis; Dimitrios Bargiotas; Vasilis Katsifas; Takvor H. Soukissian; Harilaos Kontoyiannis (Int. J. Monit. Surveillance Technol. Res., 2015)