@article{EUG_1990_25_a13,
     author = {\ensuremath{\Gamma}. M\ensuremath{\eta}\ensuremath{\tau}\ensuremath{\alpha}\ensuremath{\kappa}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma}},
     title = {T\ensuremath{\alpha} {N\ensuremath{\varepsilon}\ensuremath{\alpha}} {M\ensuremath{\alpha}\ensuremath{\theta}\ensuremath{\eta}\ensuremath{\mu}\ensuremath{\alpha}\ensuremath{\tau}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\alpha}}},
     journal = {E\ensuremath{\upsilon}\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\Gamma}},
     pages = {85--100},
     year = {1990},
     volume = {25},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/EUG_1990_25_a13/}
}