@article{EUG_1995_42_a1,
     author = {A. Kalapodi  and  A. Kontolatou},
     title = {Some {Remarks} or {v-Ideal} {Systems} and {Categories} of semigroups},
     journal = {E\ensuremath{\upsilon}\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\Gamma}},
     pages = {27--32},
     year = {1995},
     volume = {42},
     language = {gr},
     url = {http://geodesic.mathdoc.fr/item/EUG_1995_42_a1/}
}