1. P. T. Bateman, Hans Radstrom, Olaf Hanner, A. M. Macbeath, C. A. Rogers, V. L. Klee, Seminar on convex sets, The Institute for Advanced Study, Princeton, N.J., 1949–1950. Reprinted November, 1955, 88–MR0080938
2. An Existence Theorem in Problems of Optimal Control