@article{EUG_1990__27_a25,
     author = {K.B. \ensuremath{\Sigma}o\ensuremath{\upsilon}\ensuremath{\rho}\ensuremath{\lambda}\ensuremath{\acute\alpha}\ensuremath{\varsigma} and  E. Ko\ensuremath{\lambda}\ensuremath{\acute\epsilon}\ensuremath{\zeta}\ensuremath{\alpha}-A\ensuremath{\delta}\ensuremath{\acute\alpha}\ensuremath{\mu}},
     title = {A\ensuremath{\sigma}\ensuremath{\kappa}\ensuremath{\acute\eta}\ensuremath{\sigma}\ensuremath{\varepsilon}\ensuremath{\iota}\ensuremath{\varsigma} \ensuremath{\kappa}\ensuremath{\alpha}\ensuremath{\iota} {\ensuremath{\Pi}\ensuremath{\rho}o\ensuremath{\beta}\ensuremath{\lambda}\ensuremath{\acute\eta}\ensuremath{\mu}\ensuremath{\alpha}\ensuremath{\tau}\ensuremath{\alpha}.} {M\ensuremath{\iota}\ensuremath{\alpha}} {\ensuremath{\Lambda}\ensuremath{\varepsilon}\ensuremath{\iota}\ensuremath{\tau}o\ensuremath{\upsilon}\ensuremath{\rho}\ensuremath{\gamma}\ensuremath{\iota}\ensuremath{\kappa}\ensuremath{\acute\eta}} {T\ensuremath{\alpha}\ensuremath{\xi}\ensuremath{\iota}\ensuremath{\nu}\'{o}\ensuremath{\mu}\ensuremath{\eta}\ensuremath{\sigma}\ensuremath{\eta}.}},
     journal = {E\ensuremath{\upsilon}\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\Gamma}
},
     pages = {30-90},
     publisher = {mathdoc},
     volume = {27},
     year = {1990},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/EUG_1990__27_a25/}
}