@article{EUG_1989_22_a18,
     author = {E. K\'{o}\ensuremath{\theta}\ensuremath{\alpha}\ensuremath{\lambda}\ensuremath{\eta}-K\ensuremath{\alpha}\ensuremath{\lambda}o\ensuremath{\kappa}o\ensuremath{\acute\upsilon}\ensuremath{\rho}\ensuremath{\eta}},
     title = {M\ensuremath{\iota}\ensuremath{\alpha} \ensuremath{\delta}\ensuremath{\iota}\ensuremath{\delta}\ensuremath{\alpha}\ensuremath{\kappa}\ensuremath{\tau}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\eta} \ensuremath{\delta}\ensuremath{\rho}\ensuremath{\alpha}\ensuremath{\sigma}\ensuremath{\tau}\ensuremath{\eta}\ensuremath{\rho}\ensuremath{\iota}\'{o}\ensuremath{\tau}\ensuremath{\eta}\ensuremath{\tau}\ensuremath{\alpha} \ensuremath{\gamma}\ensuremath{\iota}\ensuremath{\alpha} \ensuremath{\nu}\ensuremath{\alpha} \ensuremath{\alpha}\ensuremath{\sigma}\ensuremath{\kappa}\ensuremath{\eta}\ensuremath{\theta}o\ensuremath{\acute\upsilon}\ensuremath{\nu} o\ensuremath{\iota} \ensuremath{\mu}\ensuremath{\alpha}\ensuremath{\theta}\ensuremath{\eta}\ensuremath{\tau}\ensuremath{\acute\epsilon}\ensuremath{\varsigma} \ensuremath{\sigma}\ensuremath{\tau}\ensuremath{\eta}\ensuremath{\nu} \ensuremath{\varepsilon}\ensuremath{\kappa}\ensuremath{\tau}\ensuremath{\acute\epsilon}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\sigma}\ensuremath{\eta} {\ensuremath{\Pi}\ensuremath{\rho}\ensuremath{\acute\alpha}\ensuremath{\xi}\ensuremath{\varepsilon}\ensuremath{\omega}\ensuremath{\nu}}},
     journal = {E\ensuremath{\upsilon}\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\Gamma}},
     pages = {19--26},
     year = {1989},
     volume = {22},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/EUG_1989_22_a18/}
}