The Magnus Representation of the Torelli Group I{g,1} is not faithful for g >= 2, Proceedings of the American Mathematical Society 130 (2002), 909-914.
Twisted Alexander polynomials and surjectivity of a group homomorphism (joint work with T. Kitano and M. Wada), Algebraic and Geometric Topology 5 (2005), 1315-1324.
Abelianizations of derivation Lie algebras of the free associative algebra and the free Lie algebra (joint work with S. Morita and T. Sakasai), Duke Mathematical Journal, 162 (2013), 965-1002.
Integral Euler characteristic of Out F_{11} (joint work with S. Morita and T. Sakasai), Experimental Mathematics, 24 (2015), 93-97.
Non-meridional epimorphisms of knot groups (joint work with Jae Choon Cha), Algebraic and Geometric Topology, 16 (2016), 1135-1155.
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