@article{EUG_1990_26_a19,
     author = {\ensuremath{\Sigma}\ensuremath{\tau}\ensuremath{\acute\epsilon}\ensuremath{\varphi}\ensuremath{\alpha}\ensuremath{\nu}o\ensuremath{\varsigma} M\ensuremath{\pi}\ensuremath{\alpha}\ensuremath{\lambda}\ensuremath{\acute\eta}\ensuremath{\varsigma}},
     title = {T\ensuremath{\alpha} {M\ensuremath{\alpha}\ensuremath{\theta}\ensuremath{\eta}\ensuremath{\mu}\ensuremath{\alpha}\ensuremath{\tau}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\alpha}} \ensuremath{\sigma}\ensuremath{\tau}\ensuremath{\eta}\ensuremath{\nu} {\ensuremath{\Pi}o\ensuremath{\acute\iota}\ensuremath{\eta}\ensuremath{\sigma}\ensuremath{\eta}} \ensuremath{\tau}o\ensuremath{\upsilon} {O\ensuremath{\delta}\ensuremath{\upsilon}\ensuremath{\sigma}\ensuremath{\sigma}\ensuremath{\acute\epsilon}\ensuremath{\alpha}} {E\ensuremath{\lambda}\ensuremath{\acute\upsilon}\ensuremath{\tau}\ensuremath{\eta}.}},
     journal = {E\ensuremath{\upsilon}\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\Gamma}},
     pages = {1--17},
     year = {1990},
     volume = {26},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/EUG_1990_26_a19/}
}