Spectroscopic studies of NaCs for the ground state asymptote of Na + Cs pairs O. Docenko, M. Tamanis, R. Ferber, A. Pashov, H. Knöckel and E. Tiemann Eur. Phys. J. D, 31 2 (2004) 205-211 Published online: 23 November 2004 DOI: 10.1140/epjd/e2004-00156-5