@article{MR_1997_47_a8,
     author = {I\ensuremath{\omega}\ensuremath{\acute\alpha}\ensuremath{\nu}\ensuremath{\nu}\ensuremath{\eta}\ensuremath{\varsigma} K\ensuremath{\varepsilon}\ensuremath{\chi}\ensuremath{\alpha}\ensuremath{\gamma}\ensuremath{\iota}\ensuremath{\acute\alpha}\ensuremath{\varsigma} and  \'{}A\ensuremath{\nu}\ensuremath{\nu}\ensuremath{\alpha} M\ensuremath{\varepsilon}\ensuremath{\rho}\ensuremath{\acute\iota}\ensuremath{\kappa}\ensuremath{\alpha} and  A\ensuremath{\nu}\ensuremath{\delta}\ensuremath{\rho}\ensuremath{\acute\epsilon}\ensuremath{\alpha}\ensuremath{\varsigma} M\ensuremath{\varepsilon}\ensuremath{\rho}\ensuremath{\acute\iota}\ensuremath{\kappa}\ensuremath{\alpha}\ensuremath{\varsigma}},
     title = {\ensuremath{\Pi}\ensuremath{\rho}o\ensuremath{\sigma}\ensuremath{\delta}\ensuremath{\iota}o\ensuremath{\rho}\ensuremath{\iota}\ensuremath{\sigma}\ensuremath{\mu}\'{o}\ensuremath{\varsigma} \ensuremath{\tau}o\ensuremath{\upsilon} \ensuremath{\alpha}\ensuremath{\nu}\ensuremath{\alpha}\ensuremath{\gamma}\ensuremath{\kappa}\ensuremath{\alpha}\ensuremath{\acute\iota}o\ensuremath{\upsilon} \ensuremath{\mu}\ensuremath{\varepsilon}\ensuremath{\gamma}\ensuremath{\acute\epsilon}\ensuremath{\theta}o\ensuremath{\upsilon}\ensuremath{\varsigma} \ensuremath{\alpha}\ensuremath{\acute\upsilon}\ensuremath{\xi}\ensuremath{\eta}\ensuremath{\sigma}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\tau}\ensuremath{\omega}\ensuremath{\nu} \ensuremath{\pi}\ensuremath{\omega}\ensuremath{\lambda}\ensuremath{\acute\eta}\ensuremath{\sigma}\ensuremath{\varepsilon}\ensuremath{\omega}\ensuremath{\nu} \ensuremath{\tau}o o\ensuremath{\pi}o\ensuremath{\acute\iota}o \ensuremath{\alpha}\ensuremath{\pi}\ensuremath{\alpha}\ensuremath{\iota}\ensuremath{\tau}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\tau}\ensuremath{\alpha}\ensuremath{\iota} \ensuremath{\gamma}\ensuremath{\iota}\ensuremath{\alpha} \ensuremath{\nu}\ensuremath{\alpha} \ensuremath{\delta}\ensuremath{\iota}\ensuremath{\alpha}\ensuremath{\sigma}\ensuremath{\varphi}\ensuremath{\alpha}\ensuremath{\lambda}\ensuremath{\iota}\ensuremath{\sigma}\ensuremath{\tau}o\ensuremath{\acute\upsilon}\ensuremath{\nu} \ensuremath{\tau}\ensuremath{\alpha} \ensuremath{\acute\epsilon}\ensuremath{\sigma}o\ensuremath{\delta}\ensuremath{\alpha} \ensuremath{\tau}\ensuremath{\omega}\ensuremath{\nu} \ensuremath{\varepsilon}\ensuremath{\pi}\ensuremath{\iota}\ensuremath{\chi}\ensuremath{\varepsilon}\ensuremath{\iota}\ensuremath{\rho}\ensuremath{\acute\eta}\ensuremath{\sigma}\ensuremath{\varepsilon}\ensuremath{\omega}\ensuremath{\nu} \ensuremath{\alpha}\ensuremath{\pi}\'{o} \ensuremath{\tau}\ensuremath{\eta}\ensuremath{\nu} \ensuremath{\pi}\ensuremath{\alpha}\ensuremath{\rho}o\ensuremath{\chi}\ensuremath{\acute\eta} \ensuremath{\varepsilon}\ensuremath{\kappa}\ensuremath{\pi}\ensuremath{\tau}\ensuremath{\acute\omega}\ensuremath{\sigma}\ensuremath{\varepsilon}\ensuremath{\omega}\ensuremath{\nu}},
     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 = {3--12},
     year = {1997},
     volume = {47},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1997_47_a8/}
}