@article{EUG_1984_4_a128,
     author = {\ensuremath{\Gamma}. M\ensuremath{\varepsilon}\ensuremath{\nu}\ensuremath{\delta}\ensuremath{\omega}\ensuremath{\nu}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma}},
     title = {\ensuremath{\Sigma}\ensuremath{\acute\upsilon}\ensuremath{\sigma}\ensuremath{\tau}\ensuremath{\eta}\ensuremath{\mu}\ensuremath{\alpha} \ensuremath{\pi}o\ensuremath{\lambda}\ensuremath{\lambda}\ensuremath{\alpha}\ensuremath{\pi}\ensuremath{\lambda}\ensuremath{\acute\omega}\ensuremath{\nu} \ensuremath{\varepsilon}\ensuremath{\pi}\ensuremath{\iota}\ensuremath{\lambda}o\ensuremath{\gamma}\ensuremath{\acute\omega}\ensuremath{\nu}},
     journal = {E\ensuremath{\upsilon}\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\Gamma}},
     pages = {12--14},
     year = {1984},
     volume = {4},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/EUG_1984_4_a128/}
}