@article{MR_1977_5_a31,
     author = {K. M\ensuremath{\alpha}\ensuremath{\kappa}\ensuremath{\rho}\ensuremath{\acute\eta}\ensuremath{\varsigma} and  X. K\ensuremath{\acute\alpha}\ensuremath{\rho}\ensuremath{\alpha}\ensuremath{\lambda}\ensuremath{\eta}\ensuremath{\varsigma} and  O. K\ensuremath{\alpha}\ensuremath{\tau}\ensuremath{\sigma}\ensuremath{\acute\alpha}\ensuremath{\nu}o\ensuremath{\varsigma} and  \ensuremath{\Pi}. M\ensuremath{\alpha}\ensuremath{\kappa}\ensuremath{\rho}\ensuremath{\upsilon}\ensuremath{\pi}\'{o}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma} and  K. K\ensuremath{\upsilon}\ensuremath{\rho}\ensuremath{\iota}\ensuremath{\acute\alpha}\ensuremath{\kappa}\ensuremath{\eta}\ensuremath{\varsigma}},
     title = {--\ensuremath{\Gamma}\ensuremath{\iota}\ensuremath{\alpha} \ensuremath{\tau}\ensuremath{\eta}\ensuremath{\nu} {\ensuremath{\Gamma}΄} \ensuremath{\tau}\ensuremath{\acute\alpha}\ensuremath{\xi}\ensuremath{\eta}},
     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 = {27--32},
     year = {1977},
     volume = {5},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1977_5_a31/}
}