@article{SF_1977__15_134267,
     author = {R. E. Jamison},
     title = {Tietze's convexity theorey for lattices and semilattices.},
     journal = {Semigroup forum},
     pages = {357--374},
     year = {1977},
     volume = {15},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SF_1977__15_134267/}
}