1. Density matrices in the quantum theory of matter: Energy, intracules and extracules
2. Density Matrices and Density Functionals;Thakkar,1987
3. Computational Chemistry, Part A;Boyd,1992
4. Many-Electron Densities and Reduced Density Matrices;Valderrama,2000
5. Many-Electron Densities and Reduced Density Matrices;Koga,2000