@article{EU_1973-1974_08_a0,
     author = {\ensuremath{\Gamma}. \ensuremath{\Gamma}o\ensuremath{\upsilon}\ensuremath{\mu}\ensuremath{\alpha}\ensuremath{\lambda}\ensuremath{\acute\alpha}\ensuremath{\tau}\ensuremath{\sigma}o\ensuremath{\upsilon}-A\ensuremath{\nu}\ensuremath{\alpha}\ensuremath{\gamma}\ensuremath{\nu}\ensuremath{\omega}\ensuremath{\sigma}\ensuremath{\tau}o\ensuremath{\pi}o\ensuremath{\acute\upsilon}\ensuremath{\lambda}o\ensuremath{\upsilon}},
     title = {\ensuremath{\Sigma}\ensuremath{\upsilon}\ensuremath{\sigma}\ensuremath{\tau}\ensuremath{\acute\eta}\ensuremath{\mu}\ensuremath{\alpha}\ensuremath{\tau}\ensuremath{\alpha} \ensuremath{\alpha}\ensuremath{\nu}\ensuremath{\alpha}\ensuremath{\mu}o\ensuremath{\nu}\ensuremath{\acute\eta}\ensuremath{\varsigma}},
     journal = {E\ensuremath{\upsilon}\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma}},
     pages = {7--8},
     year = {1973-1974},
     volume = {08},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/EU_1973-1974_08_a0/}
}