@article{EU_1974-1975_02_a13,
     author = {\'{}A\ensuremath{\gamma}\ensuremath{\nu}\ensuremath{\omega}\ensuremath{\sigma}\ensuremath{\tau}o\ensuremath{\varsigma} \ensuremath{\Sigma}\ensuremath{\upsilon}\ensuremath{\gamma}\ensuremath{\gamma}\ensuremath{\rho}\ensuremath{\alpha}\ensuremath{\varphi}\ensuremath{\acute\epsilon}\ensuremath{\alpha}\ensuremath{\varsigma}},
     title = {\ensuremath{\Gamma}\ensuremath{\varepsilon}\ensuremath{\nu}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\alpha}\ensuremath{\acute\iota} {A\ensuremath{\sigma}\ensuremath{\kappa}\ensuremath{\acute\eta}\ensuremath{\sigma}\ensuremath{\varepsilon}\ensuremath{\iota}\ensuremath{\varsigma}}},
     journal = {E\ensuremath{\upsilon}\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma}},
     pages = {55--62},
     year = {1974-1975},
     volume = {02},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/EU_1974-1975_02_a13/}
}