@article{MR_1977_8_a3,
     author = {A. N. \ensuremath{\Phi}\ensuremath{\iota}\ensuremath{\lambda}\ensuremath{\acute\iota}\ensuremath{\pi}\ensuremath{\pi}o\ensuremath{\upsilon}},
     title = {A\ensuremath{\beta}\ensuremath{\varepsilon}\ensuremath{\beta}\ensuremath{\alpha}\ensuremath{\iota}\'{o}\ensuremath{\tau}\ensuremath{\eta}\ensuremath{\tau}\ensuremath{\alpha}, {\ensuremath{\Pi}\ensuremath{\lambda}\ensuremath{\eta}\ensuremath{\rho}o\ensuremath{\varphi}o\ensuremath{\rho}\ensuremath{\acute\iota}\ensuremath{\alpha}} \ensuremath{\kappa}\ensuremath{\alpha}\ensuremath{\iota} {\ensuremath{\Sigma}\ensuremath{\tau}\ensuremath{\alpha}\ensuremath{\tau}\ensuremath{\iota}\ensuremath{\sigma}\ensuremath{\tau}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\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 = {57--96},
     year = {1977},
     volume = {8},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1977_8_a3/}
}