Chistyakov Denis Sergeevich «Abelian groups with UA-ring of endomorphisms and their homogeneous mappings» // Tomsk State University Journal of Mathematics and Mechanics 2014. №4(30) C.49-56
Chistyakov Denis Sergeevich, Lyubimcev Oleg Vladimirovich «On torsion-free abelian groups with ua-rings of endomorphisms» // 2011. №2(14) C.55-58