@article{MR_1978_11_a0,
     author = {A. \ensuremath{\Sigma}. K\ensuremath{\varepsilon}\ensuremath{\chi}\ensuremath{\rho}\ensuremath{\acute\eta}\ensuremath{\varsigma}},
     title = {H {A\ensuremath{\nu}\ensuremath{\alpha}\ensuremath{\gamma}\ensuremath{\acute\epsilon}\ensuremath{\nu}\ensuremath{\nu}\ensuremath{\eta}\ensuremath{\sigma}\ensuremath{\eta}} \ensuremath{\tau}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\pi}\ensuremath{\varepsilon}\ensuremath{\rho}\ensuremath{\iota}\ensuremath{\gamma}\ensuremath{\rho}\ensuremath{\alpha}\ensuremath{\varphi}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\eta}\ensuremath{\varsigma} \ensuremath{\sigma}\ensuremath{\upsilon}\ensuremath{\nu}o\ensuremath{\lambda}o\ensuremath{\theta}\ensuremath{\varepsilon}\ensuremath{\omega}\ensuremath{\rho}\ensuremath{\acute\iota}\ensuremath{\alpha}\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 = {3--20},
     year = {1978},
     volume = {11},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1978_11_a0/}
}