@article{MR_1977_8_a8,
     author = {J. F. Rig},
     title = {A\ensuremath{\nu}\ensuremath{\iota}\ensuremath{\sigma}\'{o}\ensuremath{\tau}\ensuremath{\eta}\ensuremath{\tau}\ensuremath{\varepsilon}\ensuremath{\varsigma} \ensuremath{\pi}o\ensuremath{\upsilon} \ensuremath{\alpha}\ensuremath{\varphi}o\ensuremath{\rho}o\ensuremath{\acute\upsilon}\ensuremath{\nu} \ensuremath{\tau}\ensuremath{\alpha} \ensuremath{\varepsilon}\ensuremath{\mu}\ensuremath{\beta}\ensuremath{\alpha}\ensuremath{\delta}\ensuremath{\acute\alpha} \ensuremath{\varepsilon}\ensuremath{\gamma}\ensuremath{\gamma}\ensuremath{\varepsilon}\ensuremath{\gamma}\ensuremath{\rho}\ensuremath{\alpha}\ensuremath{\mu}\ensuremath{\mu}\ensuremath{\acute\epsilon}\ensuremath{\nu}\ensuremath{\omega}\ensuremath{\nu} \ensuremath{\tau}\ensuremath{\rho}\ensuremath{\iota}\ensuremath{\gamma}\ensuremath{\acute\omega}\ensuremath{\nu}\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 = {143--148},
     year = {1977},
     volume = {8},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1977_8_a8/}
}