@article{EUG_1993_38_a24,
     author = {H\ensuremath{\lambda}\ensuremath{\acute\iota}\ensuremath{\alpha}\ensuremath{\varsigma} \ensuremath{\Lambda}\ensuremath{\upsilon}\ensuremath{\pi}\ensuremath{\iota}\ensuremath{\tau}\ensuremath{\acute\alpha}\ensuremath{\kappa}\ensuremath{\eta}\ensuremath{\varsigma}},
     title = {M\ensuremath{\alpha}\ensuremath{\theta}\ensuremath{\eta}\ensuremath{\mu}\ensuremath{\alpha}\ensuremath{\tau}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\alpha} \ensuremath{\kappa}\ensuremath{\alpha}\ensuremath{\iota} {\ensuremath{\Pi}\ensuremath{\lambda}\ensuremath{\eta}\ensuremath{\rho}o\ensuremath{\varphi}o\ensuremath{\rho}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\eta}:} {To} \ensuremath{\pi}\ensuremath{\rho}\'{o}\ensuremath{\gamma}\ensuremath{\rho}\ensuremath{\alpha}\ensuremath{\mu}\ensuremath{\mu}\ensuremath{\alpha} {EUROMATH}},
     journal = {E\ensuremath{\upsilon}\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\Gamma}},
     pages = {3--13},
     year = {1993},
     volume = {38},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/EUG_1993_38_a24/}
}