@article{EUG_1991_30-31_a0,
     author = {\ensuremath{\Delta}. I. M\ensuremath{\pi}o\ensuremath{\upsilon}\ensuremath{\nu}\ensuremath{\acute\alpha}\ensuremath{\kappa}\ensuremath{\eta}\ensuremath{\varsigma}},
     title = {\ensuremath{\Delta}\ensuremath{\iota}\ensuremath{\delta}\ensuremath{\alpha}\ensuremath{\kappa}\ensuremath{\tau}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\eta} {\ensuremath{\Pi}\ensuremath{\rho}\ensuremath{\acute\alpha}\ensuremath{\xi}\ensuremath{\eta}} \ensuremath{\kappa}\ensuremath{\alpha}\ensuremath{\iota} {\ensuremath{\Delta}\ensuremath{\eta}\ensuremath{\mu}\ensuremath{\iota}o\ensuremath{\upsilon}\ensuremath{\rho}\ensuremath{\gamma}\ensuremath{\acute\iota}\ensuremath{\alpha}} {K\ensuremath{\iota}\ensuremath{\nu}\ensuremath{\acute\eta}\ensuremath{\tau}\ensuremath{\rho}\ensuremath{\omega}\ensuremath{\nu}} {M\ensuremath{\acute\alpha}\ensuremath{\theta}\ensuremath{\eta}\ensuremath{\sigma}\ensuremath{\eta}\ensuremath{\varsigma}}},
     journal = {E\ensuremath{\upsilon}\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\Gamma}},
     pages = {1--13},
     year = {1991},
     volume = {30-31},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/EUG_1991_30-31_a0/}
}