CHAO, Yi-Ju; LIU, Fon-Che. 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: 8 jul. 2025.