@article{10_21136_CMJ_1976_101383,
     author = {Putcha, Mohan S.},
     title = {Positive functions from $\mathcal{S}$-indecomposable semigroups into partially ordered sets},
     journal = {Czechoslovak Mathematical Journal},
     pages = {161--170},
     year = {1976},
     volume = {26},
     number = {1},
     doi = {10.21136/CMJ.1976.101383},
     mrnumber = {0390102},
     zbl = {0338.20087},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1976.101383/}
}