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2. A.J. Coleman, V.I. Yukalov, Reduced Density Matrices: Coulson’s Challenge (Springer, New York, 2000)
3. Reduced Density Matrices with Applications to Physical and Chemical Systems, eds. by A.J. Coleman, R.M. Erdahl. Queen’s Papers on Pure and Applied Mathematics—No. 11 (Queen’s University, Kingston, ON, 1968)
4. Reduced Density Matrices with Applications to Physical and Chemical Systems II, eds. by R.M. Erdahl. Queen’s Papers on Pure and Applied Mathematics—No. 40 (Queen’s University, Kingston, ON, 1974)
5. Density Matrices and Density Functionals, eds. by R.M. Erdahl, V. Smith. Proceedings of the A.J. Coleman Symposium, Kingston, ON, 1985 (Reidel, Dordrecht, 1987)