@article{oai:nagoya.repo.nii.ac.jp:00017981,
 author = {Matsumoto, Kohji and Tsumura, Hirofumi},
 issue = {5},
 journal = {Annales de l'institut Fourier},
 month = {},
 note = {We define Witten multiple zeta-functions associated with semisimple Lie algebras sl(n), (n=2,3,...) of several complex variables, and prove the analytic continuation of them. These can be regarded as several variable generalizations of Witten zeta-functions defined by Zagier. In the case sl(4), we determine the singularities of this function. Furthermore we prove certain functional relations among this function, the Mordell-Tornheim double zeta-functions and the Riemann zeta-function. Using these relations, we prove new and non-trivial evaluation formulas for special values of this function at positive integers.},
 pages = {1457--1504},
 title = {On Witten multiple zeta-functions associated with semisimple Lie algebras I},
 volume = {56},
 year = {2006}
}