Magnus, WimWimMagnusLemmens, LucienLucienLemmensBrosens, FonsFonsBrosens2021-10-242021-10-2420170378-4371https://imec-publications.be/handle/20.500.12860/28885Quantum canonical ensemble: a projection operator approachJournal articlehttp://www.sciencedirect.com/science/article/pii/S0378437117303795