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2. Reduced Density Matrices in Quantum Chemistry; Academic Press: New York, 1976, and references therein.
3. Reduced Density Matrices with Applications to Physical and Chemical Systems; Eds.; Queen's Papers on Pure and Applied Mathematics, No. 11; Queen's University: Kingston, Ontario, 1968.
4. Reduced Density Matrices with Applications to Physical and Chemical Systems II; Ed.; Queen's Papers on Pure and Applied Mathematics, No. 140; Queen's University: Kingston, Ontario, 1974.
5. Density Matrices and Density Functionals: Proceedings of the A. John Coleman Symposium; Eds.; Reidel: Dordrecht, 1987.