Sets of zero discrete harmonic densityGRAHAM, COLIN C.; HARE, KATHRYN E. · Mathematical Proceedings of the Cambridge Philosophical Society · 2010

Characterizations of Classes of $I_0$ Sets in Discrete Abelian GroupsGraham, Colin C.; Hare, Kathryn E. · Rocky Mountain Journal of Mathematics · 2010

I0 SETS FOR COMPACT, CONNECTED GROUPS: INTERPOLATION WITH MEASURES THAT ARE NONNEGATIVE OR OF SMALL SUPPORTGRAHAM, COLIN C.; HARE, KATHRYN E. · Journal of the Australian Mathematical Society · 2008

$varepsilon$-Kronecker and $I_{0}$ sets in abelian groups, I: arithmetic properties of $varepsilon$-Kronecker setsGRAHAM, COLIN C.; HARE, KATHRYN E. · Mathematical Proceedings of the Cambridge Philosophical Society · 2006