@article{MR_1977_7_a8,
     author = {H\ensuremath{\rho}\ensuremath{\alpha} A\ensuremath{\nu}\ensuremath{\tau}\ensuremath{\omega}\ensuremath{\nu}o\ensuremath{\pi}o\ensuremath{\acute\upsilon}\ensuremath{\lambda}o\ensuremath{\upsilon}},
     title = {A\ensuremath{\sigma}\ensuremath{\acute\upsilon}\ensuremath{\mu}\ensuremath{\mu}\ensuremath{\varepsilon}\ensuremath{\tau}\ensuremath{\rho}\ensuremath{\alpha} {E\ensuremath{\upsilon}\ensuremath{\theta}\ensuremath{\acute\upsilon}\ensuremath{\gamma}\ensuremath{\rho}\ensuremath{\alpha}\ensuremath{\mu}\ensuremath{\mu}\ensuremath{\alpha}} \ensuremath{\tau}\ensuremath{\mu}\ensuremath{\acute\eta}\ensuremath{\mu}\ensuremath{\alpha}\ensuremath{\tau}\ensuremath{\alpha} \ensuremath{\kappa}\ensuremath{\alpha}\ensuremath{\iota} \ensuremath{\pi}\ensuremath{\omega}\ensuremath{\varsigma} \ensuremath{\mu}\ensuremath{\alpha}\ensuremath{\varsigma} \ensuremath{\kappa}\ensuremath{\acute\alpha}\ensuremath{\nu}o\ensuremath{\upsilon}\ensuremath{\nu} \ensuremath{\tau}\ensuremath{\eta} \ensuremath{\zeta}\ensuremath{\omega}\ensuremath{\acute\eta} \ensuremath{\delta}\ensuremath{\acute\upsilon}\ensuremath{\sigma}\ensuremath{\kappa}o\ensuremath{\lambda}\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 = {12--16},
     year = {1977},
     volume = {7},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1977_7_a8/}
}