The conditions of solubility by domination of concave $n$-person games
A. I. Gol'berg, V. A. Gurvich, M. Yu. Rosenbloom, K. M. Khanin

References
1.	Gabay D., Moulin H., On the uniqueness and stability of Nash equilibrium in noncooperative games, Applied stochastic control in econometric and management science, North Holland Publishing Co., Amsterdam, 1980
2.	Mulen E., Teoriya igr, Mir, M., 1985