@article{EUG_1987__15_a6,
     author = { },
     title = {\'{}E\ensuremath{\kappa}\ensuremath{\theta}\ensuremath{\varepsilon}\ensuremath{\sigma}\ensuremath{\eta} \ensuremath{\pi}\ensuremath{\varepsilon}\ensuremath{\pi}\ensuremath{\rho}\ensuremath{\alpha}\ensuremath{\gamma}\ensuremath{\mu}\ensuremath{\acute\epsilon}\ensuremath{\nu}\ensuremath{\omega}\ensuremath{\nu} \ensuremath{\acute\epsilon}\ensuremath{\tau}o\ensuremath{\upsilon}\ensuremath{\varsigma} 1974},
     journal = {E\ensuremath{\upsilon}\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\Gamma}
},
     pages = {186-196},
     publisher = {mathdoc},
     volume = {15},
     year = {1987},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/EUG_1987__15_a6/}
}