@article{MR_1981__24_a6,
     author = {\ensuremath{\Gamma}. \ensuremath{\Sigma}\ensuremath{\tau}\ensuremath{\rho}\ensuremath{\alpha}\ensuremath{\tau}\ensuremath{\acute\eta}\ensuremath{\varsigma} and  \ensuremath{\Sigma}. Z\ensuremath{\acute\eta}\ensuremath{\lambda}\ensuremath{\iota}\ensuremath{\alpha} and  A. I\ensuremath{\varepsilon}\ensuremath{\rho}\ensuremath{\varepsilon}\ensuremath{\mu}\ensuremath{\acute\iota}\ensuremath{\alpha}\ensuremath{\varsigma} and  A. K\ensuremath{\upsilon}\ensuremath{\rho}\ensuremath{\acute\iota}\ensuremath{\tau}\ensuremath{\sigma}\ensuremath{\eta}\ensuremath{\varsigma} and  K. K\ensuremath{\upsilon}\ensuremath{\rho}\ensuremath{\acute\iota}\ensuremath{\tau}\ensuremath{\sigma}\ensuremath{\eta}\ensuremath{\varsigma} and  K. T\ensuremath{\zeta}\ensuremath{\alpha}\ensuremath{\nu}\ensuremath{\acute\alpha}\ensuremath{\kappa}\ensuremath{\eta}\ensuremath{\varsigma} and  H. K\ensuremath{\omega}\ensuremath{\nu}\ensuremath{\sigma}\ensuremath{\tau}\ensuremath{\alpha}\ensuremath{\nu}\ensuremath{\tau}\'{o}\ensuremath{\pi}o\ensuremath{\upsilon}\ensuremath{\lambda}o\ensuremath{\varsigma} and  \ensuremath{\Xi}. M\ensuremath{\varepsilon}\ensuremath{\lambda}\ensuremath{\acute\epsilon}\ensuremath{\kappa}o\ensuremath{\varsigma} and  \ensuremath{\Theta}. \ensuremath{\Pi}\ensuremath{\alpha}\ensuremath{\pi}\ensuremath{\alpha}\ensuremath{\nu}\ensuremath{\iota}\ensuremath{\kappa}o\ensuremath{\lambda}\ensuremath{\acute\alpha}o\ensuremath{\upsilon} and  N. T\ensuremath{\sigma}\ensuremath{\iota}\ensuremath{\kappa}\'{o}\ensuremath{\pi}o\ensuremath{\upsilon}\ensuremath{\lambda}o\ensuremath{\varsigma}},
     title = {\ensuremath{\Pi}\ensuremath{\rho}o\ensuremath{\beta}\ensuremath{\lambda}\ensuremath{\acute\eta}\ensuremath{\mu}\ensuremath{\alpha}\ensuremath{\tau}\ensuremath{\alpha} \ensuremath{\tau}\ensuremath{\omega}\ensuremath{\nu} {\ensuremath{\Theta}\ensuremath{\varepsilon}\ensuremath{\mu}\ensuremath{\varepsilon}\ensuremath{\lambda}\ensuremath{\acute\iota}\ensuremath{\omega}\ensuremath{\nu}} \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}.}},
     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 = {3-31},
     publisher = {mathdoc},
     volume = {24},
     year = {1981},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1981__24_a6/}
}