@article{SF_1991__43_3_135094,
     author = {T.C. Craven},
     title = {Orderings on semirings.},
     journal = {Semigroup forum},
     pages = {45--52},
     publisher = {mathdoc},
     volume = {43},
     number = {3},
     year = {1991},
     zbl = {0732.16031},
     url = {http://geodesic.mathdoc.fr/item/SF_1991__43_3_135094/}
}