Theoretical investigation of the ultrafast NeNePo spectroscopy of Au4 and Ag4 ClustersM. Hartmann, R. Mitrić, B. Stanca and V. Bonačić-KouteckýEur. Phys. J. D, 16 1-3 (2001) 151-155DOI: https://doi.org/10.1007/s100530170080