@article{EUG_1984__3_a50,
     author = {A\ensuremath{\nu}\ensuremath{\alpha}\ensuremath{\sigma}\ensuremath{\tau}\ensuremath{\acute\alpha}\ensuremath{\sigma}\ensuremath{\iota}o\ensuremath{\varsigma} \ensuremath{\Pi}\ensuremath{\alpha}\ensuremath{\tau}\ensuremath{\rho}\ensuremath{\acute\omega}\ensuremath{\nu}\ensuremath{\eta}\ensuremath{\varsigma} and  N\ensuremath{\acute\iota}\ensuremath{\kappa}o\ensuremath{\varsigma} T\ensuremath{\zeta}\ensuremath{\alpha}\ensuremath{\nu}\ensuremath{\acute\alpha}\ensuremath{\kappa}\ensuremath{\eta}\ensuremath{\varsigma} and  N\ensuremath{\acute\iota}\ensuremath{\kappa}\ensuremath{\eta} \ensuremath{\Pi}\ensuremath{\acute\alpha}\ensuremath{\lambda}\ensuremath{\lambda}\ensuremath{\alpha} and  \ensuremath{\Theta}\ensuremath{\varepsilon}\'{o}\ensuremath{\delta}\ensuremath{\omega}\ensuremath{\rho}o\ensuremath{\varsigma} P\ensuremath{\acute\eta}\ensuremath{\gamma}\ensuremath{\alpha}\ensuremath{\varsigma} and  N\ensuremath{\acute\iota}\ensuremath{\kappa}o\ensuremath{\varsigma} \ensuremath{\Sigma}\ensuremath{\tau}\ensuremath{\alpha}\ensuremath{\mu}\ensuremath{\alpha}\ensuremath{\tau}\ensuremath{\acute\alpha}\ensuremath{\varsigma}},
     title = {\ensuremath{\Gamma}\ensuremath{\iota}\ensuremath{\alpha}  \ensuremath{\tau}\ensuremath{\eta} {\ensuremath{\Gamma}΄T\ensuremath{\acute\alpha}\ensuremath{\xi}\ensuremath{\eta}.} {\ensuremath{\Lambda}\ensuremath{\acute\upsilon}\ensuremath{\sigma}\ensuremath{\eta}} \ensuremath{\mu}\ensuremath{\varepsilon}\ensuremath{\rho}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\omega}\ensuremath{\nu} \ensuremath{\alpha}\ensuremath{\sigma}\ensuremath{\kappa}\ensuremath{\acute\eta}\ensuremath{\sigma}\ensuremath{\varepsilon}\ensuremath{\omega}\ensuremath{\nu} \ensuremath{\alpha}\ensuremath{\pi}\'{o} \ensuremath{\tau}o \ensuremath{\pi}\ensuremath{\rho}o\ensuremath{\eta}\ensuremath{\gamma}o\ensuremath{\acute\upsilon}\ensuremath{\mu}\ensuremath{\varepsilon}\ensuremath{\nu}o \ensuremath{\tau}\ensuremath{\varepsilon}\ensuremath{\acute\upsilon}\ensuremath{\chi}o\ensuremath{\varsigma}.},
     journal = {E\ensuremath{\upsilon}\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\Gamma}
},
     pages = {18-27},
     publisher = {mathdoc},
     volume = {3},
     year = {1984},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/EUG_1984__3_a50/}
}