@article{MR_1976_4_a88,
     author = {Ko\ensuremath{\upsilon}\ensuremath{\rho}\ensuremath{\kappa}o\ensuremath{\upsilon}\ensuremath{\rho}\ensuremath{\acute\eta}\ensuremath{\varsigma} N. and  \ensuremath{\Theta}. K\ensuremath{\alpha}\ensuremath{\rho}\ensuremath{\alpha}\ensuremath{\mu}\ensuremath{\acute\alpha}\ensuremath{\nu}o\ensuremath{\upsilon}},
     title = {-\ensuremath{\Gamma}\ensuremath{\iota}\ensuremath{\alpha} \ensuremath{\tau}\ensuremath{\eta}\ensuremath{\nu} {A΄} \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 = {20--23},
     year = {1976},
     volume = {4},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1976_4_a88/}
}