@article{AUCMP_2012__53_1_a1,
     author = {Kepka, Tom\'a\v{s} and N\v{e}mec, Petr},
     title = {(Pre)order preserving additive homomorphisms of (pre)ordered commutative semigroups into real numbers},
     journal = {Acta Universitatis Carolinae. Mathematica et Physica},
     pages = {3--32},
     publisher = {mathdoc},
     volume = {53},
     number = {1},
     year = {2012},
     mrnumber = {3099399},
     zbl = {06186450},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUCMP_2012__53_1_a1/}
}