@article{MR_1980_17_a19,
     author = {\ensuremath{\Delta}. M\ensuremath{\pi}o\ensuremath{\upsilon}\ensuremath{\nu}\ensuremath{\acute\alpha}\ensuremath{\kappa}\ensuremath{\eta}\ensuremath{\varsigma}},
     title = {K\ensuremath{\upsilon}\ensuremath{\lambda}\ensuremath{\iota}\ensuremath{\nu}\ensuremath{\delta}\ensuremath{\rho}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\epsilon}\ensuremath{\varsigma} {To\ensuremath{\mu}\ensuremath{\acute\epsilon}\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 = {4--21},
     year = {1980},
     volume = {17},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1980_17_a19/}
}