@article{EU_1973-1974__01_a7,
     author = { },
     title = {\ensuremath{\alpha}\ensuremath{\sigma}\ensuremath{\kappa}\ensuremath{\acute\eta}\ensuremath{\sigma}\ensuremath{\varepsilon}\ensuremath{\iota}\ensuremath{\varsigma} \ensuremath{\delta}\ensuremath{\iota}\ensuremath{\alpha} \ensuremath{\tau}\ensuremath{\eta}\ensuremath{\nu} \ensuremath{\varepsilon}΄\ensuremath{\tau}\ensuremath{\acute\alpha}\ensuremath{\xi}\ensuremath{\iota}\ensuremath{\nu}},
     journal = {E\ensuremath{\upsilon}\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma}
},
     pages = {46-50},
     publisher = {mathdoc},
     volume = {01},
     year = {1973-1974},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/EU_1973-1974__01_a7/}
}