Grinshpon I.E. «On the Similarity of Almost Holomorphically Isomorphic DirectProducts of Torsion Free Groups » // 2008. №2 (3) C.31-38
Yeltsova T.A. , Grinshpon S.Ya. «Homomorphic Stability of Direct Product TorsionFree Abelian Groups » // 2008. №1 (2) C.32-36
