ABDUL AZIZ, Zainal. A Glimpse on the Relationship between Feynman Integral and Integrable Systems. MATEMATIKA, [S. l.], v. 20, p. 125–132, 2004. DOI: 10.11113/matematika.v20.n.152. Disponível em: https://matematika.utm.my/index.php/matematika/article/view/152. Acesso em: 6 may. 2024.