ORVEREM, J. M. 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://scientifica.umyu.edu.ng/index.php/scientifica/article/view/557. Acesso em: 23 feb. 2025.