@article{SF_1989__38_2_134956,
     author = {M. Munteanu and M. Schwarz},
     title = {A characterization of generators of positive translation semigroups.},
     journal = {Semigroup forum},
     pages = {223--232},
     publisher = {mathdoc},
     volume = {38},
     number = {2},
     year = {1989},
     zbl = {0683.47026},
     url = {http://geodesic.mathdoc.fr/item/SF_1989__38_2_134956/}
}