@article{MR_1980_20_a17,
     author = {K.B. \ensuremath{\Sigma}o\ensuremath{\upsilon}\ensuremath{\rho}\ensuremath{\lambda}\ensuremath{\acute\alpha}\ensuremath{\varsigma}},
     title = {O\ensuremath{\lambda}o\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\acute\eta}\ensuremath{\rho}\ensuremath{\omega}\ensuremath{\mu}\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 = {2--26},
     year = {1980},
     volume = {20},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1980_20_a17/}
}