ZWIERZCHOWSKA, Joanna. Hyperbolicity of systems describing value functions in differential games which model duopoly problems. Decision Making in Manufacturing and Services, [S. l.], v. 9, n. 1, p. 89–100, 2016. DOI: 10.7494/dmms.2015.9.1.89. Disponível em: https://journals.agh.edu.pl/dmms/article/view/1674. Acesso em: 15 apr. 2025.