@article{EU_1973-1974_05_a4,
     author = {T\ensuremath{\zeta}\ensuremath{\alpha}\ensuremath{\nu}\ensuremath{\acute\alpha}\ensuremath{\kappa}\ensuremath{\eta}\ensuremath{\varsigma} N. and  N. \ensuremath{\Pi}\ensuremath{\alpha}\ensuremath{\gamma}\ensuremath{\acute\alpha}\ensuremath{\nu}\ensuremath{\eta}\ensuremath{\varsigma}},
     title = {\ensuremath{\Gamma}΄T\ensuremath{\acute\alpha}\ensuremath{\xi}\ensuremath{\eta} {\ensuremath{\Gamma}\ensuremath{\upsilon}\ensuremath{\mu}\ensuremath{\nu}\ensuremath{\alpha}\ensuremath{\sigma}\ensuremath{\acute\iota}o\ensuremath{\upsilon}}},
     journal = {E\ensuremath{\upsilon}\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma}},
     pages = {16--27},
     year = {1973-1974},
     volume = {05},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/EU_1973-1974_05_a4/}
}