@article{MR_1987__32_a4,
     author = {N. A\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\xi}\ensuremath{\alpha}\ensuremath{\nu}\ensuremath{\delta}\ensuremath{\rho}\ensuremath{\acute\eta}\ensuremath{\varsigma} and  A. K\ensuremath{\omega}\ensuremath{\sigma}\ensuremath{\tau}\ensuremath{\acute\alpha}\ensuremath{\kappa}o\ensuremath{\varsigma} and  \ensuremath{\Lambda}. \ensuremath{\Sigma}\ensuremath{\tau}\ensuremath{\varepsilon}\ensuremath{\rho}\ensuremath{\gamma}\ensuremath{\iota}o\ensuremath{\pi}o\ensuremath{\acute\upsilon}\ensuremath{\lambda}o\ensuremath{\upsilon}-K\ensuremath{\alpha}\ensuremath{\lambda}\ensuremath{\alpha}\ensuremath{\nu}\ensuremath{\tau}\ensuremath{\zeta}\ensuremath{\acute\eta}},
     title = {\ensuremath{\Pi}\ensuremath{\rho}o\ensuremath{\gamma}\ensuremath{\rho}\ensuremath{\alpha}\ensuremath{\mu}\ensuremath{\mu}\ensuremath{\alpha}\ensuremath{\tau}\ensuremath{\iota}\ensuremath{\sigma}\ensuremath{\mu}\'{o}\ensuremath{\varsigma}: {A\ensuremath{\lambda}\ensuremath{\lambda}\ensuremath{\eta}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\pi}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\rho}\ensuremath{\alpha}\ensuremath{\sigma}\ensuremath{\eta}} \ensuremath{\mu}\ensuremath{\varepsilon} \ensuremath{\beta}\ensuremath{\alpha}\ensuremath{\sigma}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\epsilon}\ensuremath{\varsigma} \ensuremath{\mu}\ensuremath{\alpha}\ensuremath{\theta}\ensuremath{\eta}\ensuremath{\mu}\ensuremath{\alpha}\ensuremath{\tau}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\epsilon}\ensuremath{\varsigma} \ensuremath{\acute\epsilon}\ensuremath{\nu}\ensuremath{\nu}o\ensuremath{\iota}\ensuremath{\varepsilon}\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 = {63-78},
     publisher = {mathdoc},
     volume = {32},
     year = {1987},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1987__32_a4/}
}