@article{EUG_1991_29_a25,
     author = {\ensuremath{\Gamma}.M. T\ensuremath{\rho}o\ensuremath{\acute\upsilon}\ensuremath{\lambda}\ensuremath{\eta}\ensuremath{\varsigma}},
     title = {\ensuremath{\Pi}\'{o}\ensuremath{\sigma}o {\ensuremath{\Xi}\ensuremath{\acute\epsilon}\ensuremath{\rho}o\ensuremath{\upsilon}\ensuremath{\nu}} o\ensuremath{\iota} {M\ensuremath{\alpha}\ensuremath{\theta}\ensuremath{\eta}\ensuremath{\tau}\ensuremath{\acute\epsilon}\ensuremath{\varsigma}} \ensuremath{\tau}\ensuremath{\eta}\ensuremath{\varsigma} {\'{}E\ensuremath{\kappa}\ensuremath{\tau}\ensuremath{\eta}\ensuremath{\varsigma}} {\ensuremath{\Delta}\ensuremath{\eta}\ensuremath{\mu}o\ensuremath{\tau}\ensuremath{\iota}\ensuremath{\kappa}o\ensuremath{\acute\upsilon}} \ensuremath{\tau}\ensuremath{\eta} {\ensuremath{\Gamma}\ensuremath{\lambda}\ensuremath{\acute\omega}\ensuremath{\sigma}\ensuremath{\sigma}\ensuremath{\alpha}} \ensuremath{\tau}\ensuremath{\omega}\ensuremath{\nu} {M\ensuremath{\alpha}\ensuremath{\theta}\ensuremath{\eta}\ensuremath{\mu}\ensuremath{\alpha}\ensuremath{\tau}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\omega}\ensuremath{\nu}.} {(E\ensuremath{\rho}\ensuremath{\varepsilon}\ensuremath{\upsilon}\ensuremath{\nu}\ensuremath{\eta}\ensuremath{\tau}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\eta}} {\ensuremath{\Pi}\ensuremath{\rho}o\ensuremath{\sigma}\ensuremath{\acute\epsilon}\ensuremath{\gamma}\ensuremath{\gamma}\ensuremath{\iota}\ensuremath{\sigma}\ensuremath{\eta}).}},
     journal = {E\ensuremath{\upsilon}\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\Gamma}},
     pages = {67--91},
     year = {1991},
     volume = {29},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/EUG_1991_29_a25/}
}