@article{EUG_1987_14_a24,
     author = {\ensuremath{\Delta}\ensuremath{\eta}\ensuremath{\mu}\ensuremath{\eta}\ensuremath{\tau}\ensuremath{\rho}\ensuremath{\acute\iota}o\ensuremath{\upsilon} K\ensuremath{\rho}\ensuremath{\alpha}\ensuremath{\beta}\ensuremath{\beta}\ensuremath{\alpha}\ensuremath{\rho}\ensuremath{\acute\iota}\ensuremath{\tau}\ensuremath{\eta}\ensuremath{\varsigma}},
     title = {\ensuremath{\Theta}\ensuremath{\varepsilon}\ensuremath{\omega}\ensuremath{\rho}\ensuremath{\acute\eta}\ensuremath{\mu}\ensuremath{\alpha}\ensuremath{\tau}\ensuremath{\alpha} {\ensuremath{\Upsilon}\ensuremath{\pi}\ensuremath{\acute\alpha}\ensuremath{\rho}\ensuremath{\xi}\ensuremath{\varepsilon}\ensuremath{\omega}\ensuremath{\varsigma}} \ensuremath{\gamma}\ensuremath{\iota}\ensuremath{\alpha} \ensuremath{\mu}\ensuremath{\eta} {\ensuremath{\Gamma}\ensuremath{\rho}\ensuremath{\alpha}\ensuremath{\mu}\ensuremath{\mu}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\epsilon}\ensuremath{\varsigma}} {T\ensuremath{\upsilon}\ensuremath{\chi}\ensuremath{\alpha}\ensuremath{\acute\iota}\ensuremath{\varepsilon}\ensuremath{\varsigma}} {E\ensuremath{\xi}\ensuremath{\iota}\ensuremath{\sigma}\ensuremath{\acute\omega}\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} \ensuremath{\Gamma}},
     pages = {50--57},
     year = {1987},
     volume = {14},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/EUG_1987_14_a24/}
}