Negative ion photoelectron spectroscopy of 2,2'-bithiophene cluster anions, (2T)n- (n = 1–100)M. Mitsui, Y. Matsumoto, N. Ando and A. NakajimaEur. Phys. J. D, 34 1-3 (2005) 169-172DOI: https://doi.org/10.1140/epjd/e2005-00139-0