CHAO, Y.-J.; LIU, F.-C. Equilibrium value and measure of systems of functions. Topological Methods in Nonlinear Analysis, [S. l.], v. 5, n. 2, p. 255–259, 1995. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.1995.016. Acesso em: 22 jul. 2024.