@article{MR_1975_2_a150,
     author = {\ensuremath{\Pi}\ensuremath{\alpha}\ensuremath{\rho}\ensuremath{\alpha}\ensuremath{\sigma}\ensuremath{\kappa}\ensuremath{\varepsilon}\ensuremath{\upsilon}\ensuremath{\acute\alpha}\ensuremath{\varsigma} M\ensuremath{\alpha}\ensuremath{\rho}o\ensuremath{\upsilon}\ensuremath{\sigma}\ensuremath{\acute\alpha}\ensuremath{\kappa}\ensuremath{\eta}\ensuremath{\varsigma} and  B\ensuremath{\alpha}\ensuremath{\gamma}\ensuremath{\gamma}\ensuremath{\acute\epsilon}\ensuremath{\lambda}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\Pi}o\ensuremath{\lambda}\ensuremath{\upsilon}\ensuremath{\delta}o\ensuremath{\acute\upsilon}\ensuremath{\rho}\ensuremath{\eta}\ensuremath{\varsigma} and  X\ensuremath{\rho}\ensuremath{\acute\eta}\ensuremath{\sigma}\ensuremath{\tau}o\ensuremath{\varsigma} \ensuremath{\Sigma}\ensuremath{\tau}\ensuremath{\acute\epsilon}\ensuremath{\lambda}\ensuremath{\lambda}\ensuremath{\alpha}\ensuremath{\varsigma}},
     title = {\ensuremath{\Gamma}\ensuremath{\iota}\ensuremath{\alpha} \ensuremath{\tau}\ensuremath{\eta}\ensuremath{\nu} {A} \ensuremath{\tau}\ensuremath{\acute\alpha}\ensuremath{\xi}\ensuremath{\eta}: {H} \ensuremath{\kappa}\ensuremath{\acute\iota}\ensuremath{\nu}\ensuremath{\eta}\ensuremath{\sigma}\ensuremath{\eta} \ensuremath{\kappa}\ensuremath{\alpha}\ensuremath{\iota} \ensuremath{\tau}\ensuremath{\alpha} \ensuremath{\sigma}\ensuremath{\chi}\ensuremath{\acute\eta}\ensuremath{\mu}\ensuremath{\alpha}\ensuremath{\tau}\ensuremath{\alpha} \ensuremath{\tau}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\gamma}\ensuremath{\varepsilon}\ensuremath{\omega}\ensuremath{\mu}\ensuremath{\varepsilon}\ensuremath{\tau}\ensuremath{\rho}\ensuremath{\acute\iota}\ensuremath{\alpha}\ensuremath{\varsigma}. {M\ensuremath{\acute\epsilon}\ensuremath{\tau}\ensuremath{\rho}\ensuremath{\eta}\ensuremath{\sigma}\ensuremath{\eta}} \ensuremath{\kappa}\ensuremath{\alpha}\ensuremath{\iota} {\ensuremath{\mu}\ensuremath{\acute\epsilon}\ensuremath{\gamma}\ensuremath{\varepsilon}\ensuremath{\theta}o\ensuremath{\varsigma}.\ensuremath{\Pi}\ensuremath{\omega}\ensuremath{\varsigma}} \ensuremath{\alpha}\ensuremath{\pi}\'{o} \ensuremath{\tau}\ensuremath{\eta}\ensuremath{\nu} \ensuremath{\alpha}\ensuremath{\rho}\ensuremath{\iota}\ensuremath{\theta}\ensuremath{\mu}\ensuremath{\eta}\ensuremath{\tau}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\eta} \ensuremath{\iota}\ensuremath{\sigma}\'{o}\ensuremath{\tau}\ensuremath{\eta}\ensuremath{\tau}\ensuremath{\alpha} \ensuremath{\varphi}\ensuremath{\tau}\ensuremath{\acute\alpha}\ensuremath{\nu}o\ensuremath{\upsilon}\ensuremath{\mu}\ensuremath{\varepsilon} \ensuremath{\sigma}\ensuremath{\tau}\ensuremath{\eta}\ensuremath{\nu} \ensuremath{\varepsilon}\ensuremath{\xi}\ensuremath{\acute\iota}\ensuremath{\sigma}\ensuremath{\omega}\ensuremath{\sigma}\ensuremath{\eta}},
     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 = {43--50},
     year = {1975},
     volume = {2},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1975_2_a150/}
}