@article{EUG_1987_14_a26,
     author = {\ensuremath{\Pi}.A.M. T\ensuremath{\zeta}\ensuremath{\varepsilon}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\pi}\ensuremath{\acute\iota}\ensuremath{\delta}o\ensuremath{\upsilon}},
     title = {\ensuremath{\Gamma}\ensuremath{\varepsilon}\ensuremath{\omega}\ensuremath{\mu}\ensuremath{\varepsilon}\ensuremath{\tau}\ensuremath{\rho}\ensuremath{\acute\iota}\ensuremath{\alpha} \ensuremath{\sigma}\ensuremath{\tau}\ensuremath{\eta} {\ensuremath{\Phi}\ensuremath{\upsilon}\ensuremath{\sigma}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\eta}}},
     journal = {E\ensuremath{\upsilon}\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\Gamma}},
     pages = {92--96},
     year = {1987},
     volume = {14},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/EUG_1987_14_a26/}
}