COMMUNICATIONS IN ALGEBRA, cilt.42, sa.3, ss.1287-1311, 2014 (SCI-Expanded)
Representations of posets in certain modules are used to find indecomposable almost completely decomposable torsion-free abelian groups. For a special class of almost completely decomposable groups we determine the possible ranks of indecomposable groups and show that the possible ranks are realized by indecomposable groups in the class.