1. 3. L. S. Shapley and M. Shubik, Solutions of n-person games with ordinal utilities (abstract), Econometrica vol. 21 (1953) p. 348.
2. Solutions to general non-zero-sum games;Gillies, Donald B.,1959
3. Acceptable points in general cooperative 𝑛-person games;Aumann, Robert J.,1959