@article{MR_1977_6_a26,
     author = {K. \ensuremath{\Pi}\ensuremath{\alpha}\ensuremath{\pi}o\ensuremath{\acute\upsilon}\ensuremath{\lambda}\ensuremath{\iota}\ensuremath{\alpha} and  \ensuremath{\Theta}. K\ensuremath{\alpha}\ensuremath{\rho}\ensuremath{\alpha}\ensuremath{\mu}\ensuremath{\alpha}\ensuremath{\nu}\ensuremath{\lambda}\ensuremath{\acute\eta}\ensuremath{\varsigma}},
     title = {T\ensuremath{\rho}\'{o}\ensuremath{\pi}o\ensuremath{\iota} \ensuremath{\varepsilon}\ensuremath{\pi}\ensuremath{\iota}\ensuremath{\kappa}o\ensuremath{\iota}\ensuremath{\nu}\ensuremath{\omega}\ensuremath{\nu}\ensuremath{\acute\iota}\ensuremath{\alpha}\ensuremath{\varsigma} \ensuremath{\mu}\ensuremath{\varepsilon} \ensuremath{\tau}o\ensuremath{\nu} \ensuremath{\upsilon}\ensuremath{\pi}o\ensuremath{\lambda}o\ensuremath{\gamma}\ensuremath{\iota}\ensuremath{\sigma}\ensuremath{\tau}\ensuremath{\acute\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 = {45--46},
     year = {1977},
     volume = {6},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1977_6_a26/}
}