@article{MR_1977_5_a4,
     author = {\ensuremath{\Sigma}. \ensuremath{\Pi}\ensuremath{\alpha}\ensuremath{\pi}\ensuremath{\alpha}\ensuremath{\delta}\'{o}\ensuremath{\pi}o\ensuremath{\upsilon}\ensuremath{\lambda}o\ensuremath{\varsigma}},
     title = {\ensuremath{\Phi}o\ensuremath{\rho}\ensuremath{\mu}\ensuremath{\alpha}\ensuremath{\lambda}\ensuremath{\iota}\ensuremath{\sigma}\ensuremath{\mu}\'{o}\ensuremath{\varsigma} \ensuremath{\tau}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\theta}\ensuremath{\varepsilon}\ensuremath{\omega}\ensuremath{\rho}\ensuremath{\acute\iota}\ensuremath{\alpha}\ensuremath{\varsigma} \ensuremath{\tau}\ensuremath{\omega}\ensuremath{\nu} {\ensuremath{\Sigma}\ensuremath{\upsilon}\ensuremath{\nu}\'{o}\ensuremath{\lambda}\ensuremath{\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 = {53--70},
     year = {1977},
     volume = {5},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1977_5_a4/}
}