@article{EUG_1991_28_a13,
     author = {A\ensuremath{\nu}\ensuremath{\tau}\ensuremath{\rho}\ensuremath{\acute\epsilon}\ensuremath{\alpha}\ensuremath{\varsigma} \ensuremath{\Pi}o\ensuremath{\acute\upsilon}\ensuremath{\lambda}o\ensuremath{\varsigma}},
     title = {H \ensuremath{\sigma}\ensuremath{\eta}\ensuremath{\mu}\ensuremath{\alpha}\ensuremath{\sigma}\ensuremath{\acute\iota}\ensuremath{\alpha} \ensuremath{\tau}\ensuremath{\omega}\ensuremath{\nu} {M\ensuremath{\alpha}\ensuremath{\theta}\ensuremath{\eta}\ensuremath{\mu}\ensuremath{\alpha}\ensuremath{\tau}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\omega}\ensuremath{\nu}} \ensuremath{\kappa}\ensuremath{\alpha}\ensuremath{\iota} o\ensuremath{\iota} {N\'{o}\ensuremath{\mu}o\ensuremath{\iota}} \ensuremath{\tau}\ensuremath{\eta}\ensuremath{\varsigma} {A\ensuremath{\nu}\ensuremath{\acute\alpha}\ensuremath{\pi}\ensuremath{\tau}\ensuremath{\upsilon}\ensuremath{\xi}\ensuremath{\acute\eta}\ensuremath{\varsigma}} \ensuremath{\tau}o\ensuremath{\upsilon}\ensuremath{\varsigma}},
     journal = {E\ensuremath{\upsilon}\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\Gamma}},
     pages = {42--49},
     year = {1991},
     volume = {28},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/EUG_1991_28_a13/}
}