On the theory of fermion density operators. I

Studies in the theory of the generalized density operators III. The N-fermion representability problem for the first order generalized density operator

Studies in the theory of the generalized density operators V. The N-fermion representability problem for the second order generalized density operator

Hubbard operator density functional theory for Fermionic lattice models

Single-particle approximation to the canonical density operator of a system of N interacting fermions

Many-particle correlations of fermion clusters in the method of transition density operators

On the Averages of Operators in Finite Fermion Systems