@article{EU_1973-1974__10_a13,
     author = {M\ensuremath{\iota}\ensuremath{\chi}\ensuremath{\acute\alpha}\ensuremath{\lambda}\ensuremath{\eta}\ensuremath{\varsigma} B\'{o}\ensuremath{\sigma}\ensuremath{\kappa}o\ensuremath{\gamma}\ensuremath{\lambda}o\ensuremath{\upsilon}},
     title = {O\ensuremath{\rho}\ensuremath{\acute\iota}\ensuremath{\zeta}o\ensuremath{\upsilon}\ensuremath{\sigma}\ensuremath{\varepsilon}\ensuremath{\varsigma}},
     journal = {E\ensuremath{\upsilon}\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma}
},
     pages = {59-71},
     publisher = {mathdoc},
     volume = {10},
     year = {1973-1974},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/EU_1973-1974__10_a13/}
}