ORVEREM, Joel Mvendaga. A Linear Approximation of the Non-linear Modified Langumir and Van der Pol Differential Equations by the Application of the Generalized Sundman Transformation. UMYU Scientifica, [S. l.], v. 3, n. 4, p. 441–447, 2024. DOI: 10.56919/usci.2434.038. Disponível em: https://publications.umyu.edu.ng/scientifica/index.php/usci/article/view/211. Acesso em: 24 may. 2026.