RAHMANE, Mebrouk; REMILI, Moussadek; D. OUDJEDI., Linda. Stability, Boundedness, and Square Integrability of Solutions of Neutral Fourth-Order Differential Equations. Armenian Journal of Mathematics, Yerevan, Armenia, v. 11, n. 10, p. 1–17, 2019. Disponível em: https://armjmath.sci.am/index.php/ajm/article/view/265. Acesso em: 11 apr. 2025.