@article{EU_1975-1976_1_a45,
     author = {N. \ensuremath{\Delta}. \ensuremath{\Sigma}\ensuremath{\omega}\ensuremath{\tau}\ensuremath{\eta}\ensuremath{\rho}\ensuremath{\acute\alpha}\ensuremath{\kappa}\ensuremath{\eta}\ensuremath{\varsigma}},
     title = {H \ensuremath{\gamma}\ensuremath{\varepsilon}\ensuremath{\nu}\ensuremath{\varepsilon}\ensuremath{\tau}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\eta} \ensuremath{\psi}\ensuremath{\upsilon}\ensuremath{\chi}o\ensuremath{\lambda}o\ensuremath{\gamma}\ensuremath{\acute\iota}\ensuremath{\alpha}},
     journal = {E\ensuremath{\upsilon}\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma}},
     pages = {18--36},
     year = {1975-1976},
     volume = {1},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/EU_1975-1976_1_a45/}
}