%0 Journal Article %A Nicolaides, Cleanthes A.%A %A Beck, D. R. %D 1976 %T Collective Excitations in Atoms and Molecules %J Journal of Physics B: Atomic, Molecular and Optical Physics %V 9 %@ 0953-4075 %R 10.1088/0022-3700/9/10/002 %I Institute of Physics Publishing %P L259–L263 %N 10 %U https://hdl.handle.net/10442/6977 %> Αποθετήριο Ήλιος / ΕΙΕ