@article{CMJ_2009__59_4_a9,
     author = {Je\v{z}ek, Jaroslav and Kepka, Tom\'a\v{s}},
     title = {The semiring of 1-preserving endomorphisms of a semilattice},
     journal = {Czechoslovak Mathematical Journal},
     pages = {999--1003},
     publisher = {mathdoc},
     volume = {59},
     number = {4},
     year = {2009},
     mrnumber = {2563572},
     zbl = {1224.06007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2009__59_4_a9/}
}