@article{MR_1998_49-50_a2,
     author = {\ensuremath{\Delta}. \ensuremath{\Sigma}\ensuremath{\tau}\ensuremath{\alpha}\ensuremath{\lambda}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma}},
     title = {\ensuremath{\Sigma}\ensuremath{\upsilon}\ensuremath{\mu}\ensuremath{\pi}\ensuremath{\alpha}\ensuremath{\gamma}o\ensuremath{\acute\upsilon}\ensuremath{\varsigma} \ensuremath{\tau}\ensuremath{\acute\upsilon}\ensuremath{\pi}o\ensuremath{\upsilon} \ensuremath{\sigma}\ensuremath{\acute\upsilon}\ensuremath{\nu}o\ensuremath{\lambda}\ensuremath{\alpha} \ensuremath{\sigma}\ensuremath{\tau}\ensuremath{\eta} \ensuremath{\mu}\ensuremath{\eta} {A\ensuremath{\rho}\ensuremath{\chi}\ensuremath{\iota}\ensuremath{\mu}\ensuremath{\acute\eta}\ensuremath{\delta}\ensuremath{\varepsilon}\ensuremath{\iota}\ensuremath{\alpha}} \ensuremath{\sigma}\ensuremath{\upsilon}\ensuremath{\nu}\ensuremath{\alpha}\ensuremath{\rho}\ensuremath{\tau}\ensuremath{\eta}\ensuremath{\sigma}\ensuremath{\iota}\ensuremath{\alpha}\ensuremath{\kappa}\ensuremath{\acute\eta} \ensuremath{\alpha}\ensuremath{\nu}\ensuremath{\acute\alpha}\ensuremath{\lambda}\ensuremath{\upsilon}\ensuremath{\sigma}\ensuremath{\eta}},
     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 = {23--146},
     year = {1998},
     volume = {49-50},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1998_49-50_a2/}
}