The structure theory of abelian $p$-groups does not depend on the properties of the ring of integers, in general. The substantial portion of this theory is based on the fact that a finitely generated $p$-group is a direct sum of cyclics. Given a hereditary torsion theory on the category $R$-{\bf Mod} of unitary left $R$-modules we can investigate torsionfree modules having the corresponding property for all torsionfree factor-modules (and a natural requirement concerning extensions of some homomorphisms). This paper continues in our previous investigations of the structural properties of such modules.
@article{118464, author = {Ladislav Bican and Blas Torrecillas}, title = {QTAG torsionfree modules}, journal = {Commentationes Mathematicae Universitatis Carolinae}, volume = {33}, year = {1992}, pages = {1-20}, zbl = {0765.16009}, mrnumber = {1173740}, language = {en}, url = {http://dml.mathdoc.fr/item/118464} }
Bican, Ladislav; Torrecillas, Blas. QTAG torsionfree modules. Commentationes Mathematicae Universitatis Carolinae, Tome 33 (1992) pp. 1-20. http://gdmltest.u-ga.fr/item/118464/
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