NTEUMAGNE, Bienvenue Feugang; MOITSHEKI, Raseelo J. Optimal systems and group invariant solutions for a model arising in financial mathematics. Mathematical Modelling and Analysis, [S. l.], v. 14, n. 4, p. 495–502, 2009. DOI: 10.3846/1392-6292.2009.14.495-502. Disponível em: https://journals.vilniustech.lt/index.php/MMA/article/view/6572. Acesso em: 5 jul. 2025.