BALACHANDRAN, K.; ANTHONI, S. M. EXISTENCE OF SOLUTIONS OF SECOND ORDER NEUTRAL FUNCTIONAL DIFFERENTIAL EQUATIONS. Tamkang Journal of Mathematics, [S. l.], v. 30, n. 4, p. 299–309, 1999. DOI: 10.5556/j.tkjm.30.1999.4236. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/4236. Acesso em: 16 jul. 2024.