@article{EUG_1991__29_a14,
     author = {\ensuremath{\Pi}. M\ensuremath{\alpha}\ensuremath{\rho}o\ensuremath{\upsilon}\ensuremath{\sigma}\ensuremath{\acute\epsilon}\ensuremath{\lambda}\ensuremath{\eta}\ensuremath{\varsigma}},
     title = {O {\ensuremath{\Pi}\ensuremath{\upsilon}\ensuremath{\theta}\ensuremath{\alpha}\ensuremath{\gamma}\'{o}\ensuremath{\rho}\ensuremath{\alpha}\ensuremath{\varsigma}} \ensuremath{\alpha}\ensuremath{\pi}\'{o} {\ensuremath{\Pi}o\ensuremath{\lambda}\ensuremath{\iota}\ensuremath{\tau}\ensuremath{\iota}\ensuremath{\kappa}o\ensuremath{\theta}\ensuremath{\rho}\ensuremath{\eta}\ensuremath{\sigma}\ensuremath{\kappa}\ensuremath{\varepsilon}\ensuremath{\upsilon}\ensuremath{\tau}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\eta}} {\ensuremath{\Pi}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\upsilon}\ensuremath{\rho}\ensuremath{\acute\alpha}.}},
     journal = {E\ensuremath{\upsilon}\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\Gamma}
},
     pages = {1-10},
     publisher = {mathdoc},
     volume = {29},
     year = {1991},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/EUG_1991__29_a14/}
}