@article{MR_1974_1_a106,
     author = {\ensuremath{\Pi}. X\ensuremath{\rho}\ensuremath{\iota}\ensuremath{\sigma}\ensuremath{\tau}o\ensuremath{\varphi}\'{o}\ensuremath{\rho}o\ensuremath{\upsilon}},
     title = {O\ensuremath{\iota} \ensuremath{\pi}\ensuremath{\rho}\ensuremath{\acute\omega}\ensuremath{\tau}\ensuremath{\varepsilon}\ensuremath{\varsigma} \ensuremath{\alpha}\ensuremath{\nu}\ensuremath{\tau}\ensuremath{\iota}\ensuremath{\lambda}\ensuremath{\acute\eta}\ensuremath{\psi}\ensuremath{\varepsilon}\ensuremath{\iota}\ensuremath{\varsigma} \ensuremath{\tau}o\ensuremath{\upsilon} \ensuremath{\alpha}\ensuremath{\nu}\ensuremath{\theta}\ensuremath{\rho}\ensuremath{\acute\omega}\ensuremath{\pi}o\ensuremath{\upsilon} \ensuremath{\gamma}\ensuremath{\iota}\ensuremath{\alpha} \ensuremath{\alpha}\ensuremath{\rho}\ensuremath{\iota}\ensuremath{\theta}\ensuremath{\mu}o\ensuremath{\acute\upsilon}\ensuremath{\varsigma} \ensuremath{\kappa}\ensuremath{\alpha}\ensuremath{\iota} \ensuremath{\sigma}\ensuremath{\chi}\ensuremath{\acute\eta}\ensuremath{\mu}\ensuremath{\alpha}\ensuremath{\tau}\ensuremath{\alpha}.},
     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 = {7--9},
     year = {1974},
     volume = {1},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1974_1_a106/}
}