@article{MR_1978_9_a19,
     author = { },
     title = {O\ensuremath{\iota} \ensuremath{\delta}\ensuremath{\varepsilon}\ensuremath{\kappa}\ensuremath{\alpha}\ensuremath{\delta}\ensuremath{\iota}\ensuremath{\kappa}o\ensuremath{\acute\iota} \ensuremath{\alpha}\ensuremath{\rho}\ensuremath{\iota}\ensuremath{\theta}\ensuremath{\mu}o\ensuremath{\acute\iota} \ensuremath{\kappa}\ensuremath{\alpha}\ensuremath{\iota} \ensuremath{\tau}\ensuremath{\alpha} \ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\acute\alpha}\ensuremath{\sigma}\ensuremath{\mu}\ensuremath{\alpha}\ensuremath{\tau}\ensuremath{\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 = {17--20},
     year = {1978},
     volume = {9},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1978_9_a19/}
}