@article{EUG_1991_28_a23,
     author = {\ensuremath{\Delta}. \ensuremath{\Pi}\ensuremath{\alpha}\ensuremath{\pi}\ensuremath{\alpha}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\mu}\ensuremath{\eta}\ensuremath{\tau}\ensuremath{\rho}\ensuremath{\acute\iota}o\ensuremath{\upsilon}},
     title = {\ensuremath{\Gamma}\ensuremath{\varepsilon}\ensuremath{\omega}\ensuremath{\mu}\ensuremath{\varepsilon}\ensuremath{\tau}\ensuremath{\rho}\ensuremath{\acute\iota}\ensuremath{\alpha} \ensuremath{\kappa}\ensuremath{\alpha}\ensuremath{\iota} {\ensuremath{\Sigma}\ensuremath{\acute\iota}\ensuremath{\varphi}\ensuremath{\nu}o\ensuremath{\varsigma}}},
     journal = {E\ensuremath{\upsilon}\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\Gamma}},
     pages = {98--101},
     year = {1991},
     volume = {28},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/EUG_1991_28_a23/}
}