@article{MR_1997_47_a9,
     author = {\ensuremath{\Sigma}\ensuremath{\pi}\ensuremath{\acute\upsilon}\ensuremath{\rho}o\ensuremath{\varsigma} X\ensuremath{\alpha}\ensuremath{\rho}\ensuremath{\alpha}\ensuremath{\lambda}\ensuremath{\alpha}\ensuremath{\mu}\ensuremath{\pi}\'{o}\ensuremath{\pi}o\ensuremath{\upsilon}\ensuremath{\lambda}o\ensuremath{\varsigma}},
     title = {O\ensuremath{\iota} \ensuremath{\kappa}\ensuremath{\alpha}\ensuremath{\mu}\ensuremath{\pi}\ensuremath{\acute\upsilon}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\varsigma} \ensuremath{\sigma}\ensuremath{\alpha}\ensuremath{\nu} \ensuremath{\pi}o\ensuremath{\lambda}\ensuremath{\lambda}\ensuremath{\alpha}\ensuremath{\pi}\ensuremath{\lambda}\'{o}\ensuremath{\tau}\ensuremath{\eta}\ensuremath{\tau}\ensuremath{\varepsilon}\ensuremath{\varsigma}},
     journal = {M\ensuremath{\alpha}\ensuremath{\theta}\ensuremath{\eta}\ensuremath{\mu}\ensuremath{\alpha}\ensuremath{\tau}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\eta} E\ensuremath{\pi}\ensuremath{\iota}\ensuremath{\theta}\ensuremath{\varepsilon}\ensuremath{\acute\omega}\ensuremath{\rho}\ensuremath{\eta}\ensuremath{\sigma}\ensuremath{\eta}},
     pages = {13--36},
     year = {1997},
     volume = {47},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1997_47_a9/}
}