@article{EUG_1987_14_a21,
     author = {\ensuremath{\Theta}\ensuremath{\varepsilon}\'{o}\ensuremath{\delta}\ensuremath{\omega}\ensuremath{\rho}o\ensuremath{\varsigma} A\ensuremath{\rho}\ensuremath{\tau}\ensuremath{\acute\iota}\ensuremath{\kappa}\ensuremath{\eta}\ensuremath{\varsigma}},
     title = {O {M\ensuremath{\varepsilon}\ensuremath{\tau}\ensuremath{\alpha}\ensuremath{\sigma}\ensuremath{\chi}\ensuremath{\eta}\ensuremath{\mu}\ensuremath{\alpha}\ensuremath{\tau}\ensuremath{\iota}\ensuremath{\sigma}\ensuremath{\mu}\'{o}\ensuremath{\varsigma}} {GIRAULT} \ensuremath{\gamma}\ensuremath{\iota}\ensuremath{\alpha} {X\ensuremath{\alpha}\ensuremath{\rho}\ensuremath{\alpha}\ensuremath{\kappa}\ensuremath{\tau}\ensuremath{\eta}\ensuremath{\rho}\ensuremath{\iota}\ensuremath{\sigma}\ensuremath{\tau}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\epsilon}\ensuremath{\varsigma}} {\ensuremath{\Sigma}\ensuremath{\upsilon}\ensuremath{\nu}\ensuremath{\alpha}\ensuremath{\rho}\ensuremath{\tau}\ensuremath{\acute\eta}\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 = {17--22},
     year = {1987},
     volume = {14},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/EUG_1987_14_a21/}
}