@article{MR_1980_18_a11,
     author = {\ensuremath{\Sigma}. \ensuremath{\Gamma}. E\ensuremath{\upsilon}\ensuremath{\rho}\ensuremath{\iota}\ensuremath{\pi}\ensuremath{\iota}\ensuremath{\acute\omega}\ensuremath{\tau}\ensuremath{\eta}\ensuremath{\varsigma}},
     title = {M\ensuremath{\acute\epsilon}\ensuremath{\theta}o\ensuremath{\delta}o\ensuremath{\varsigma} {\ensuremath{\Pi}\ensuremath{\rho}o\ensuremath{\sigma}\ensuremath{\delta}\ensuremath{\iota}o\ensuremath{\rho}\ensuremath{\iota}\ensuremath{\sigma}\ensuremath{\mu}o\ensuremath{\acute\upsilon}} {A\ensuremath{\kappa}\ensuremath{\rho}o\ensuremath{\tau}\ensuremath{\acute\alpha}\ensuremath{\tau}\ensuremath{\omega}\ensuremath{\nu}} {\ensuremath{\Sigma}\ensuremath{\upsilon}\ensuremath{\nu}\ensuremath{\acute\alpha}\ensuremath{\rho}\ensuremath{\tau}\ensuremath{\eta}\ensuremath{\sigma}\ensuremath{\eta}\ensuremath{\varsigma}} \ensuremath{\mu}\ensuremath{\varepsilon} {B\ensuremath{\acute\alpha}\ensuremath{\sigma}\ensuremath{\eta}} \ensuremath{\tau}\ensuremath{\eta} {Mo\ensuremath{\nu}o\ensuremath{\tau}o\ensuremath{\nu}\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 = {41--52},
     year = {1980},
     volume = {18},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1980_18_a11/}
}