KABAIVANOV, Stanimir; ZLATANOV, Boyan. A variational principle, coupled fixed points and market equilibrium. Nonlinear Analysis: Modelling and Control, [S. l.], v. 26, n. 1, p. 169–185, 2021. DOI: 10.15388/namc.2021.26.21413. Disponível em: https://www.journals.vu.lt/nonlinear-analysis/article/view/21413.. Acesso em: 25 jul. 2024.