@article{MR_1975_2_a72,
     author = {B. T\ensuremath{\zeta}\ensuremath{\alpha}\ensuremath{\beta}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\alpha}\ensuremath{\varsigma} and  E. \ensuremath{\Delta}\ensuremath{\rho}\ensuremath{\eta}\ensuremath{\beta}\ensuremath{\alpha}\ensuremath{\lambda}\ensuremath{\iota}\ensuremath{\acute\alpha}\ensuremath{\rho}\ensuremath{\eta}\ensuremath{\varsigma}},
     title = {\ensuremath{\Gamma}\ensuremath{\iota}\ensuremath{\alpha} \ensuremath{\tau}\ensuremath{\eta}\ensuremath{\nu} {E΄} \ensuremath{\tau}\ensuremath{\acute\alpha}\ensuremath{\xi}\ensuremath{\eta}. {\'{}A\ensuremath{\lambda}\ensuremath{\gamma}\ensuremath{\varepsilon}\ensuremath{\beta}\ensuremath{\rho}\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 = {40--46},
     year = {1975},
     volume = {2},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1975_2_a72/}
}