SEARCH Articles Figures Tables Concerted Phenomenon Coupled with Spin Equilibrium and Valence Fluctuation Finite valence fluctuations Fluctuating valence Fluctuating valence Fluctuating valence compounds Fluctuating valence state Interconfiguration fluctuation valence K.H. Fischer, Valence-fluctuation and heavy-fermion 4f systems Mossbauer spectroscopy valence fluctuation Valence fluctuation phenomena Valence fluctuations compounds Valence-fluctuation regime