@article{MR_1977_5_a16,
     author = {Jack A. Hope and  Ivan W. Kelly},
     title = {Ko\ensuremath{\iota}\ensuremath{\nu}\ensuremath{\acute\epsilon}\ensuremath{\varsigma} {\ensuremath{\Delta}\ensuremath{\upsilon}\ensuremath{\sigma}\ensuremath{\kappa}o\ensuremath{\lambda}\ensuremath{\acute\iota}\ensuremath{\varepsilon}\ensuremath{\varsigma}} \ensuremath{\sigma}\ensuremath{\tau}o {\ensuremath{\Lambda}o\ensuremath{\gamma}\ensuremath{\iota}\ensuremath{\sigma}\ensuremath{\mu}\'{o}} \ensuremath{\tau}\ensuremath{\omega}\ensuremath{\nu} {\ensuremath{\Pi}\ensuremath{\iota}\ensuremath{\theta}\ensuremath{\alpha}\ensuremath{\nu}o\ensuremath{\tau}\ensuremath{\acute\eta}\ensuremath{\tau}\ensuremath{\omega}\ensuremath{\nu}}},
     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 = {70--81},
     year = {1977},
     volume = {5},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1977_5_a16/}
}