@article{MR_1975_2_a145,
     author = { },
     title = {A\ensuremath{\nu}\ensuremath{\acute\alpha}\ensuremath{\lambda}\ensuremath{\upsilon}\ensuremath{\sigma}\ensuremath{\eta} {\ensuremath{\Pi}o\ensuremath{\lambda}\ensuremath{\upsilon}\ensuremath{\omega}\ensuremath{\nu}\ensuremath{\acute\upsilon}\ensuremath{\mu}o\ensuremath{\upsilon}} \ensuremath{\sigma}\ensuremath{\varepsilon} \ensuremath{\gamma}\ensuremath{\iota}\ensuremath{\nu}\'{o}\ensuremath{\mu}\ensuremath{\varepsilon}\ensuremath{\nu}o {\ensuremath{\Pi}\ensuremath{\alpha}\ensuremath{\rho}\ensuremath{\alpha}\ensuremath{\gamma}\'{o}\ensuremath{\nu}\ensuremath{\tau}\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 = {28--33},
     year = {1975},
     volume = {2},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1975_2_a145/}
}