@article{MR_1981__21_a24,
     author = {I\ensuremath{\beta}\ensuremath{\acute\alpha}\ensuremath{\nu} \ensuremath{\Gamma}\ensuremath{\kappa}\ensuremath{\acute\alpha}\ensuremath{\nu}\ensuremath{\tau}\ensuremath{\sigma}\ensuremath{\varepsilon}\ensuremath{\varphi}},
     title = {I\ensuremath{\sigma}\ensuremath{\tau}o\ensuremath{\rho}\ensuremath{\iota}\ensuremath{\kappa}o\ensuremath{\lambda}o\ensuremath{\gamma}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\eta} \ensuremath{\theta}\ensuremath{\varepsilon}\ensuremath{\mu}\ensuremath{\varepsilon}\ensuremath{\lambda}\ensuremath{\acute\iota}\ensuremath{\omega}\ensuremath{\sigma}\ensuremath{\eta} \ensuremath{\tau}\ensuremath{\eta}\ensuremath{\varsigma} {A\ensuremath{\nu}\ensuremath{\alpha}\ensuremath{\lambda}\ensuremath{\upsilon}\ensuremath{\tau}\ensuremath{\iota}\ensuremath{\kappa}o\ensuremath{\sigma}\ensuremath{\upsilon}\ensuremath{\nu}\ensuremath{\theta}\ensuremath{\varepsilon}\ensuremath{\tau}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\eta}\ensuremath{\varsigma}} \ensuremath{\mu}\ensuremath{\varepsilon}\ensuremath{\theta}\'{o}\ensuremath{\delta}o\ensuremath{\upsilon} \ensuremath{\sigma}\ensuremath{\kappa}\ensuremath{\acute\epsilon}\ensuremath{\psi}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\sigma}\ensuremath{\tau}\ensuremath{\alpha} \ensuremath{\sigma}\ensuremath{\chi}o\ensuremath{\lambda}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\alpha} {M\ensuremath{\alpha}\ensuremath{\theta}\ensuremath{\eta}\ensuremath{\mu}\ensuremath{\alpha}\ensuremath{\tau}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\alpha}.}},
     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 = {35-45},
     publisher = {mathdoc},
     volume = {21},
     year = {1981},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1981__21_a24/}
}