@article{EUG_1991_29_a19,
     author = {K\ensuremath{\alpha}\ensuremath{\lambda}\ensuremath{\alpha}\ensuremath{\beta}\ensuremath{\acute\alpha}\ensuremath{\sigma}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\Phi}\ensuremath{\rho}\ensuremath{\alpha}\ensuremath{\gamma}\ensuremath{\kappa}\ensuremath{\acute\iota}\ensuremath{\sigma}\ensuremath{\kappa}o\ensuremath{\varsigma}},
     title = {To {\ensuremath{\Pi}\ensuremath{\varepsilon}\ensuremath{\rho}\ensuremath{\iota}\ensuremath{\varepsilon}\ensuremath{\chi}\'{o}\ensuremath{\mu}\ensuremath{\varepsilon}\ensuremath{\nu}o} \ensuremath{\tau}\ensuremath{\eta}\ensuremath{\varsigma} {E\ensuremath{\kappa}\ensuremath{\pi}\ensuremath{\alpha}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\varepsilon}\ensuremath{\upsilon}\ensuremath{\sigma}\ensuremath{\eta}\ensuremath{\varsigma}} \ensuremath{\tau}\ensuremath{\omega}\ensuremath{\nu} {\ensuremath{\Delta}\ensuremath{\iota}\ensuremath{\delta}\ensuremath{\alpha}\ensuremath{\sigma}\ensuremath{\kappa}\'{o}\ensuremath{\nu}\ensuremath{\tau}\ensuremath{\omega}\ensuremath{\nu}} \ensuremath{\tau}\ensuremath{\alpha} {\ensuremath{\Sigma}\ensuremath{\chi}o\ensuremath{\lambda}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\alpha}} {M\ensuremath{\alpha}\ensuremath{\theta}\ensuremath{\eta}\ensuremath{\mu}\ensuremath{\alpha}\ensuremath{\tau}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\alpha}}},
     journal = {E\ensuremath{\upsilon}\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\Gamma}},
     pages = {19--23},
     year = {1991},
     volume = {29},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/EUG_1991_29_a19/}
}