%0 Journal Article %A Takashi Nakamura %T Joint value approximation and joint universality for several types of zeta functions %J Acta Arithmetica %D 2008 %P 67-82 %V 134 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa134-1-5/ %R 10.4064/aa134-1-5 %G en %F 10_4064_aa134_1_5