On Milnor's Class L.
The question of the existence of a certain class of "reasonable" outcomes for multi-person games, first raised in 1952 by J. W. Milnor, is settled in the negative by means of a 21-player counterexample. (See also RM-916.) 12 pp. Ref.
Shapley, Lloyd S., On Milnor's Class L.. Santa Monica, CA: RAND Corporation, 1971. https://www.rand.org/pubs/reports/R0795.html. Also available in print form.
Shapley, Lloyd S., On Milnor's Class L., Santa Monica, Calif.: RAND Corporation, R-0795-RC, 1971. As of August 03, 2022: https://www.rand.org/pubs/reports/R0795.html