@article{MR_1976__4_a53,
     author = {Z. M\ensuremath{\alpha}\ensuremath{\lambda}\ensuremath{\acute\epsilon}\ensuremath{\kappa}\ensuremath{\alpha}\ensuremath{\varsigma} and  I. K\ensuremath{\lambda}\ensuremath{\omega}\ensuremath{\nu}\ensuremath{\iota}\ensuremath{\acute\alpha}\ensuremath{\varsigma} and  K. O\ensuremath{\iota}\ensuremath{\kappa}o\ensuremath{\nu}\'{o}\ensuremath{\mu}o\ensuremath{\upsilon} and  K. T\ensuremath{\zeta}\ensuremath{\alpha}\ensuremath{\nu}\ensuremath{\acute\alpha}\ensuremath{\kappa}\ensuremath{\eta} and  X. A\ensuremath{\nu}\ensuremath{\alpha}\ensuremath{\gamma}\ensuremath{\nu}\ensuremath{\omega}\ensuremath{\sigma}\ensuremath{\tau}\'{o}\ensuremath{\pi}o\ensuremath{\upsilon}\ensuremath{\lambda}o\ensuremath{\varsigma}},
     title = {E\ensuremath{\iota}\ensuremath{\sigma}\ensuremath{\alpha}\ensuremath{\gamma}\ensuremath{\omega}\ensuremath{\gamma}\ensuremath{\acute\eta} \ensuremath{\sigma}\ensuremath{\tau}\ensuremath{\eta} \ensuremath{\gamma}\ensuremath{\varepsilon}\ensuremath{\nu}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\eta} \ensuremath{\iota}\ensuremath{\delta}\ensuremath{\acute\epsilon}\ensuremath{\alpha} \ensuremath{\tau}\ensuremath{\eta}\ensuremath{\varsigma} {To\ensuremath{\pi}o\ensuremath{\lambda}o\ensuremath{\gamma}\ensuremath{\acute\iota}\ensuremath{\alpha}\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 = {139-151},
     publisher = {mathdoc},
     volume = {4},
     year = {1976},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1976__4_a53/}
}