@article{MR_1977_6_a25,
     author = {\ensuremath{\Pi}. K\ensuremath{\upsilon}\ensuremath{\rho}\ensuremath{\acute\alpha}\ensuremath{\nu}\ensuremath{\alpha}\ensuremath{\varsigma}},
     title = {H \ensuremath{\delta}\ensuremath{\varepsilon}\ensuremath{\upsilon}\ensuremath{\tau}\ensuremath{\varepsilon}\ensuremath{\rho}o\ensuremath{\beta}\ensuremath{\acute\alpha}\ensuremath{\theta}\ensuremath{\mu}\ensuremath{\iota}\ensuremath{\alpha} \ensuremath{\varepsilon}\ensuremath{\xi}\ensuremath{\acute\iota}\ensuremath{\sigma}\ensuremath{\omega}\ensuremath{\sigma}\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 = {41--42},
     year = {1977},
     volume = {6},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1977_6_a25/}
}