1. R.N. Ball, Truncated abelian ℓ-groups II: the pointfree (Madden) representation, submitted for publication.
2. R.N. Ball, Truncated abelian ℓ-groups III: the sheaf representation, in preparation.
3. On the localic Yosida representation of an archimedean lattice ordered group with weak order unit;Ball;J. Pure Appl. Algebra,1991
4. A theorem and a question about archimedean lattice-ordered groups;Ball;Algebra Univers.,2009
5. Settling a number of questions about hyperarchimedean lattice-ordered groups;Conrad;Proc. Am. Math. Soc.,1990