@article{PORMA_1978__37_1-2_115339,
     author = {Noronha-Galv\~ao, M.L.},
     title = {Ideals in the semiring {N}},
     journal = {Portugaliae mathematica},
     pages = {113--117},
     publisher = {mathdoc},
     volume = {37},
     number = {1-2},
     year = {1978},
     mrnumber = {0620304},
     zbl = {0464.16030},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1978__37_1-2_115339/}
}