@article{EUG_1989_23_a14,
     author = {E. T\ensuremath{\rho}\ensuremath{\acute\epsilon}\ensuremath{\sigma}\ensuremath{\sigma}o\ensuremath{\upsilon}-M\ensuremath{\upsilon}\ensuremath{\lambda}\ensuremath{\omega}\ensuremath{\nu}\ensuremath{\acute\alpha}},
     title = {\ensuremath{\Gamma}\ensuremath{\upsilon}\ensuremath{\nu}\ensuremath{\alpha}\ensuremath{\acute\iota}\ensuremath{\kappa}\ensuremath{\varepsilon}\ensuremath{\varsigma} \ensuremath{\kappa}\ensuremath{\alpha}\ensuremath{\iota} {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 = {18--23},
     year = {1989},
     volume = {23},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/EUG_1989_23_a14/}
}