P. V. Ushakov, “$\operatorname{IA}$-Automorphisms of Free Products of Two Abelian Torsion-Free Groups”, Mat. Zametki, 70:6 (2001), 909–917; Math. Notes, 70:6 (2001), 830–837
2.
P. V. Ushakov, “IA-Automorphisms of Metabelian Products of Two Abelian Groups”, Mat. Zametki, 70:3 (2001), 446–457; Math. Notes, 70:3 (2001), 403–412