@article{MR_1981_24_a14,
     author = {E\ensuremath{\upsilon}\ensuremath{\acute\alpha}\ensuremath{\gamma}\ensuremath{\gamma}\ensuremath{\varepsilon}\ensuremath{\lambda}o\ensuremath{\varsigma} E\ensuremath{\upsilon}\ensuremath{\sigma}\ensuremath{\tau}\ensuremath{\alpha}\ensuremath{\theta}\'{o}\ensuremath{\pi}o\ensuremath{\upsilon}\ensuremath{\lambda}o\ensuremath{\varsigma}},
     title = {O\ensuremath{\iota} {A\ensuremath{\rho}\ensuremath{\iota}\ensuremath{\theta}\ensuremath{\mu}\ensuremath{\eta}\ensuremath{\tau}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\epsilon}\ensuremath{\varsigma}} {\ensuremath{\Delta}\ensuremath{\rho}\ensuremath{\alpha}\ensuremath{\sigma}\ensuremath{\tau}\ensuremath{\eta}\ensuremath{\rho}\ensuremath{\iota}\'{o}\ensuremath{\tau}\ensuremath{\eta}\ensuremath{\tau}\ensuremath{\varepsilon}\ensuremath{\varsigma}} \ensuremath{\sigma}\ensuremath{\tau}o {B\ensuremath{\iota}\ensuremath{\beta}\ensuremath{\lambda}\ensuremath{\acute\iota}o} {M\ensuremath{\alpha}\ensuremath{\theta}\ensuremath{\eta}\ensuremath{\mu}\ensuremath{\alpha}\ensuremath{\tau}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\omega}\ensuremath{\nu}} \ensuremath{\tau}\ensuremath{\eta}\ensuremath{\varsigma} {A΄} {\ensuremath{\Gamma}\ensuremath{\upsilon}\ensuremath{\mu}\ensuremath{\nu}\ensuremath{\alpha}\ensuremath{\sigma}\ensuremath{\acute\iota}o\ensuremath{\upsilon}.}},
     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 = {38--43},
     year = {1981},
     volume = {24},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1981_24_a14/}
}