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J.-I. Iwata, K. Yabana, G.F. Bertsch : "Real-space computational method for linear and nonlinear polarizabilities", J Comp. Meth. Sci. Eng., 4, 461-479, 2004
K. Shiratori, K. Nobusada, K. Yabana : "Multiple ionization of a silver diatomic molecule in an intense laser field", Chem. Phys. Lett., 404, 365-369, 2005