@article{CMJ_2001__51_2_a13,
     author = {Conrad, Paul F. and Darnel, Michael R.},
     title = {Subgroups and hulls of {Specker} lattice-ordered groups},
     journal = {Czechoslovak Mathematical Journal},
     pages = {395--413},
     publisher = {mathdoc},
     volume = {51},
     number = {2},
     year = {2001},
     mrnumber = {1844319},
     zbl = {0978.06011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2001__51_2_a13/}
}