The analogues of entropy and of Fisher's information measure in free probability theory, II. Dan Voiculescu — 1994 Inventiones mathematicae
The noncommutative Hilbert transform approach to free entropy Dan Voiculescu — 1998 Banach Center Publications
On a Class of KMS States for the Unitary Group U (oo). Serban Stratila; Dan Voiculescu — 1978 Mathematische Annalen
A survey on representations of the unitary group U(∞) Şerban Strǎtilǎ; Dan Voiculescu — 1982 Banach Center Publications