@article{MR_1994_42_a15,
     author = {\ensuremath{\Gamma}. K\ensuremath{\alpha}\ensuremath{\rho}\ensuremath{\alpha}\ensuremath{\kappa}\ensuremath{\acute\omega}\ensuremath{\sigma}\ensuremath{\tau}\ensuremath{\alpha}\ensuremath{\varsigma}},
     title = {\ensuremath{\Sigma}\ensuremath{\tau}o\ensuremath{\iota}\ensuremath{\chi}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\alpha} {\ensuremath{\Delta}\ensuremath{\iota}\ensuremath{\alpha}\ensuremath{\varphi}o\ensuremath{\rho}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\omega}\ensuremath{\nu}} \ensuremath{\varepsilon}\ensuremath{\xi}\ensuremath{\iota}\ensuremath{\sigma}\ensuremath{\acute\omega}\ensuremath{\sigma}\ensuremath{\varepsilon}\ensuremath{\omega}\ensuremath{\nu} (\ensuremath{\gamma}\ensuremath{\rho}\ensuremath{\alpha}\ensuremath{\mu}\ensuremath{\mu}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\epsilon}\ensuremath{\varsigma} \ensuremath{\delta}\ensuremath{\iota}\ensuremath{\alpha}\ensuremath{\varphi}o\ensuremath{\rho}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\epsilon}\ensuremath{\varsigma} \ensuremath{\varepsilon}\ensuremath{\xi}\ensuremath{\iota}\ensuremath{\sigma}\ensuremath{\acute\omega}\ensuremath{\sigma}\ensuremath{\varepsilon}\ensuremath{\iota}\ensuremath{\varsigma} 1\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\tau}\ensuremath{\acute\alpha}\ensuremath{\xi}\ensuremath{\eta}\ensuremath{\varsigma}) \ensuremath{\kappa}\ensuremath{\alpha}\ensuremath{\iota} \ensuremath{\mu}\ensuremath{\varepsilon}\ensuremath{\rho}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\epsilon}\ensuremath{\varsigma} \ensuremath{\varepsilon}\ensuremath{\varphi}\ensuremath{\alpha}\ensuremath{\rho}\ensuremath{\mu}o\ensuremath{\gamma}\ensuremath{\acute\epsilon}\ensuremath{\varsigma}},
     journal = {M\ensuremath{\alpha}\ensuremath{\theta}\ensuremath{\eta}\ensuremath{\mu}\ensuremath{\alpha}\ensuremath{\tau}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\eta} E\ensuremath{\pi}\ensuremath{\iota}\ensuremath{\theta}\ensuremath{\varepsilon}\ensuremath{\acute\omega}\ensuremath{\rho}\ensuremath{\eta}\ensuremath{\sigma}\ensuremath{\eta}},
     pages = {59--68},
     year = {1994},
     volume = {42},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1994_42_a15/}
}