@article{MR_1988_35_a14,
     author = {A\ensuremath{\nu}\ensuremath{\acute\epsilon}\ensuremath{\sigma}\ensuremath{\tau}\ensuremath{\eta}\ensuremath{\varsigma} To\ensuremath{\pi}\ensuremath{\tau}\ensuremath{\sigma}\ensuremath{\acute\eta}\ensuremath{\varsigma}},
     title = {\ensuremath{\Theta}\ensuremath{\varepsilon}\ensuremath{\omega}\ensuremath{\rho}\ensuremath{\acute\iota}\ensuremath{\alpha} {O\ensuremath{\mu}\ensuremath{\acute\alpha}\ensuremath{\delta}\ensuremath{\omega}\ensuremath{\nu}} \ensuremath{\kappa}\ensuremath{\alpha}\ensuremath{\iota} {H\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\kappa}\ensuremath{\tau}\ensuremath{\rho}o\ensuremath{\nu}\ensuremath{\iota}\ensuremath{\kappa}o\ensuremath{\acute\iota}} {\ensuremath{\Upsilon}\ensuremath{\pi}o\ensuremath{\lambda}o\ensuremath{\gamma}\ensuremath{\iota}\ensuremath{\sigma}\ensuremath{\tau}\ensuremath{\acute\epsilon}\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 = {42--51},
     year = {1988},
     volume = {35},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1988_35_a14/}
}