@article{SF_1977__15_134254,
     author = {P. K\"ohler},
     title = {Endomorphism semigroups of {Brouwerian} semilattices.},
     journal = {Semigroup forum},
     pages = {229--234},
     publisher = {mathdoc},
     volume = {15},
     year = {1977},
     zbl = {0381.06016},
     url = {http://geodesic.mathdoc.fr/item/SF_1977__15_134254/}
}