An orthogonal theory of a set-valued bifunctor
Hereditary tensor-orthogonal theories
On generation of torsion theories
On generation of torsion theories: a correction
On general concept of basic subgroups. II.
On general concept of basic subgroups
Hereditary and cohereditary preradicals
Stable and costable preradicals
Composition of preradicals
Preradicals and change of rings
Preradicals
Centrally splitting radicals
A note on test modules
Generation of preradicals
Pseudoprojective modules
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