@article{MR_1979_15_a29,
     author = {\ensuremath{\Pi}.T. M\ensuremath{\alpha}\ensuremath{\rho}\ensuremath{\kappa}\'{o}\ensuremath{\pi}o\ensuremath{\upsilon}\ensuremath{\lambda}o\ensuremath{\varsigma}},
     title = {To \ensuremath{\pi}\ensuremath{\varepsilon}\ensuremath{\delta}\ensuremath{\acute\iota}o \ensuremath{\tau}\ensuremath{\iota}\ensuremath{\mu}\ensuremath{\acute\omega}\ensuremath{\nu} \ensuremath{\mu}\ensuremath{\iota}\ensuremath{\alpha}\ensuremath{\varsigma} \ensuremath{\sigma}\ensuremath{\upsilon}\ensuremath{\nu}\ensuremath{\acute\alpha}\ensuremath{\rho}\ensuremath{\tau}\ensuremath{\eta}\ensuremath{\sigma}\ensuremath{\eta}\ensuremath{\varsigma} {f:R->R} \ensuremath{\mu}\ensuremath{\varepsilon} \ensuremath{\tau}\ensuremath{\eta} \ensuremath{\beta}o\ensuremath{\acute\eta}\ensuremath{\theta}\ensuremath{\varepsilon}\ensuremath{\iota}\ensuremath{\alpha} \ensuremath{\tau}o\ensuremath{\upsilon} o\ensuremath{\rho}\ensuremath{\acute\iota}o\ensuremath{\upsilon} \ensuremath{\kappa}\ensuremath{\alpha}\ensuremath{\iota} \ensuremath{\tau}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\pi}\ensuremath{\alpha}\ensuremath{\rho}\ensuremath{\alpha}\ensuremath{\gamma}\ensuremath{\acute\omega}\ensuremath{\gamma}o\ensuremath{\upsilon}.},
     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 = {27--47},
     year = {1979},
     volume = {15},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/MR_1979_15_a29/}
}