TY - JOUR A1 - Kümmel, S. A1 - Andrae, Karsten A1 - Reinhard, P.-G. T1 - Collectivity in the optical response. of small metal clusters JF - Applied Physics B Y1 - 2001 UR - http://dx.doi.org/10.1007/s003400100679 VL - 73 IS - 4 SP - 293 EP - 297 PB - Springer Berlin / Heidelberg ER -