@article{MR_1988_34_a18,
     author = {K\ensuremath{\acute\omega}\ensuremath{\sigma}\ensuremath{\tau}\ensuremath{\alpha}\ensuremath{\varsigma} A. P\ensuremath{\acute\eta}\ensuremath{\gamma}\ensuremath{\alpha}\ensuremath{\varsigma}},
     title = {\ensuremath{\Theta}\ensuremath{\varepsilon}\ensuremath{\omega}\ensuremath{\rho}\ensuremath{\acute\iota}\ensuremath{\alpha} \ensuremath{\acute\alpha}\ensuremath{\rho}\ensuremath{\iota}\ensuremath{\sigma}\ensuremath{\tau}o\ensuremath{\upsilon} \ensuremath{\varepsilon}\ensuremath{\lambda}\ensuremath{\acute\epsilon}\ensuremath{\gamma}\ensuremath{\chi}o\ensuremath{\upsilon} \ensuremath{\kappa}\ensuremath{\alpha}\ensuremath{\iota} {O\ensuremath{\iota}\ensuremath{\kappa}o\ensuremath{\nu}o\ensuremath{\mu}\ensuremath{\acute\iota}\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 = {30--38},
     year = {1988},
     volume = {34},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1988_34_a18/}
}