@article{MR_1988_35_a15,
     author = {A\ensuremath{\nu}\ensuremath{\nu}\ensuremath{\acute\epsilon}\ensuremath{\tau}\ensuremath{\alpha} \ensuremath{\Sigma}\ensuremath{\upsilon}\ensuremath{\nu}\ensuremath{\alpha}\ensuremath{\chi}o\ensuremath{\pi}o\ensuremath{\acute\upsilon}\ensuremath{\lambda}o\ensuremath{\upsilon}-\ensuremath{\Sigma}\ensuremath{\beta}\ensuremath{\acute\alpha}\ensuremath{\rho}\ensuremath{\nu}\ensuremath{\alpha} and  \ensuremath{\Delta}\ensuremath{\eta}\ensuremath{\mu}\ensuremath{\acute\eta}\ensuremath{\tau}\ensuremath{\rho}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\Sigma}\ensuremath{\upsilon}\ensuremath{\nu}\ensuremath{\alpha}\ensuremath{\chi}\'{o}\ensuremath{\pi}o\ensuremath{\upsilon}\ensuremath{\lambda}o\ensuremath{\varsigma}},
     title = {H {\ensuremath{\Delta}\ensuremath{\iota}\ensuremath{\delta}\ensuremath{\alpha}\ensuremath{\sigma}\ensuremath{\kappa}\ensuremath{\alpha}\ensuremath{\lambda}\ensuremath{\acute\iota}\ensuremath{\alpha}} \ensuremath{\tau}\ensuremath{\eta}\ensuremath{\varsigma} {A\ensuremath{\sigma}\ensuremath{\tau}\ensuremath{\rho}o\ensuremath{\nu}o\ensuremath{\mu}\ensuremath{\acute\iota}\ensuremath{\alpha}\ensuremath{\varsigma}} \ensuremath{\sigma}\ensuremath{\tau}\ensuremath{\eta}\ensuremath{\nu} {\ensuremath{\Pi}o\ensuremath{\lambda}\ensuremath{\iota}\ensuremath{\tau}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\alpha}} \ensuremath{\tau}o\ensuremath{\upsilon} {\ensuremath{\Pi}\ensuremath{\lambda}\ensuremath{\acute\alpha}\ensuremath{\tau}\ensuremath{\omega}\ensuremath{\nu}\ensuremath{\alpha}}},
     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 = {52--55},
     year = {1988},
     volume = {35},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1988_35_a15/}
}