The joint universality and the generalized strong recurrence for Dirichlet L-functions Takashi Nakamura — 2009 Acta Arithmetica
Joint value approximation and joint universality for several types of zeta functions Takashi Nakamura — 2008 Acta Arithmetica
On value-relations, functional relations and singularities of Mordell-Tornheim and related triple zeta-functions Kohji Matsumoto; Takashi Nakamura; Hiroyuki Ochiai; Hirofumi Tsumura — 2008 Acta Arithmetica