@article{MR_1975_3_a171,
     author = {\'{}A\ensuremath{\gamma}\ensuremath{\nu}\ensuremath{\omega}\ensuremath{\sigma}\ensuremath{\tau}o\ensuremath{\varsigma} \ensuremath{\Sigma}\ensuremath{\upsilon}\ensuremath{\gamma}\ensuremath{\gamma}\ensuremath{\rho}\ensuremath{\alpha}\ensuremath{\varphi}\ensuremath{\acute\epsilon}\ensuremath{\alpha}\ensuremath{\varsigma}},
     title = {\ensuremath{\Gamma}\ensuremath{\iota}\ensuremath{\alpha} \ensuremath{\tau}\ensuremath{\eta}\ensuremath{\nu} {\ensuremath{\Gamma}} \ensuremath{\tau}\ensuremath{\acute\alpha}\ensuremath{\xi}\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 = {82--93},
     year = {1975},
     volume = {3},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1975_3_a171/}
}