@article{MR_1977_8_a4,
     author = {I. X. \ensuremath{\Pi}\ensuremath{\alpha}\ensuremath{\nu}\ensuremath{\alpha}\ensuremath{\gamma}\ensuremath{\iota}\ensuremath{\omega}\ensuremath{\tau}\'{o}\ensuremath{\pi}o\ensuremath{\upsilon}\ensuremath{\lambda}o\ensuremath{\varsigma}},
     title = {\ensuremath{\Pi}\ensuremath{\varepsilon}\ensuremath{\rho}\ensuremath{\acute\iota} \ensuremath{\tau}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\lambda}\ensuremath{\acute\upsilon}\ensuremath{\sigma}\ensuremath{\varepsilon}\ensuremath{\omega}\ensuremath{\varsigma} \ensuremath{\tau}\ensuremath{\omega}\ensuremath{\nu} \ensuremath{\mu}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\tau}\ensuremath{\acute\omega}\ensuremath{\nu} {\ensuremath{\Delta}\ensuremath{\iota}o\ensuremath{\varphi}\ensuremath{\alpha}\ensuremath{\nu}\ensuremath{\tau}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\omega}\ensuremath{\nu}} {\ensuremath{\Pi}\ensuremath{\rho}o\ensuremath{\gamma}\ensuremath{\rho}\ensuremath{\alpha}\ensuremath{\mu}\ensuremath{\mu}\ensuremath{\acute\alpha}\ensuremath{\tau}\ensuremath{\omega}\ensuremath{\nu}} \ensuremath{\delta}\ensuremath{\iota}\ensuremath{\alpha} \ensuremath{\mu}\ensuremath{\acute\epsilon}\ensuremath{\sigma}o\ensuremath{\upsilon} \ensuremath{\eta}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\kappa}\ensuremath{\tau}\ensuremath{\rho}o\ensuremath{\nu}\ensuremath{\iota}\ensuremath{\kappa}o\ensuremath{\acute\upsilon} \ensuremath{\upsilon}\ensuremath{\pi}o\ensuremath{\lambda}o\ensuremath{\gamma}\ensuremath{\iota}\ensuremath{\sigma}\ensuremath{\tau}o\ensuremath{\acute\upsilon}},
     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 = {97--115},
     year = {1977},
     volume = {8},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1977_8_a4/}
}