@article{MR_1974_1_a52,
     author = {M. \ensuremath{\Lambda}\ensuremath{\acute\alpha}\ensuremath{\mu}\ensuremath{\pi}\ensuremath{\rho}o\ensuremath{\upsilon} and  \ensuremath{\Theta}. E\ensuremath{\xi}\ensuremath{\alpha}\ensuremath{\rho}\ensuremath{\chi}\ensuremath{\acute\alpha}\ensuremath{\kappa}o\ensuremath{\varsigma} and  \ensuremath{\Sigma}. \ensuremath{\Gamma}\ensuremath{\iota}\ensuremath{\omega}\ensuremath{\tau}\'{o}\ensuremath{\pi}o\ensuremath{\upsilon}\ensuremath{\lambda}o\ensuremath{\varsigma}},
     title = {\ensuremath{\Pi}o\ensuremath{\lambda}\ensuremath{\upsilon}\ensuremath{\omega}\ensuremath{\nu}\ensuremath{\upsilon}\ensuremath{\mu}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\epsilon}\ensuremath{\varsigma} {E\ensuremath{\xi}\ensuremath{\iota}\ensuremath{\sigma}\ensuremath{\acute\omega}\ensuremath{\sigma}\ensuremath{\varepsilon}\ensuremath{\iota}\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 = {19--53},
     year = {1974},
     volume = {1},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1974_1_a52/}
}