The entropy density of quasi-free states for a continuous boson system M. Fannes — 1978 Annales de l'I.H.P. Physique théorique
On momentum states in quantum mechanics M. Fannes; A. Verbeure; R. Weder — 1974 Annales de l'I.H.P. Physique théorique
Entropy estimates for finitely correlated states M. Fannes; B. Nachtergaele; R. F. Werner — 1992 Annales de l'I.H.P. Physique théorique