Vibrational wave packet dynamics in the silver tetramer probed by NeNePo femtosecond pump-probe spectroscopyH. Hess, K. R. Asmis, T. Leisner and L. WösteEur. Phys. J. D, 16 1-3 (2001) 145-149DOI: https://doi.org/10.1007/s100530170079