@article{CMJ_2008_58_4_a8,
     author = {Knox, Michelle L. and McGovern, Warren Wm.},
     title = {Rigid extensions of $\ell$-groups of continuous functions},
     journal = {Czechoslovak Mathematical Journal},
     pages = {993--1014},
     year = {2008},
     volume = {58},
     number = {4},
     mrnumber = {2471161},
     zbl = {1174.06341},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2008_58_4_a8/}
}