@article{EU_1975-1976__1_a99,
     author = { },
     title = {\ensuremath{\Gamma}\ensuremath{\iota}\ensuremath{\alpha} \ensuremath{\tau}\ensuremath{\eta}\ensuremath{\nu} {\ensuremath{\Gamma}΄} \ensuremath{\tau}\ensuremath{\acute\alpha}\ensuremath{\xi}\ensuremath{\eta}--},
     journal = {E\ensuremath{\upsilon}\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma}
},
     pages = {28-32},
     publisher = {mathdoc},
     volume = {1},
     year = {1975-1976},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/EU_1975-1976__1_a99/}
}