Stability, Boundedness, and Square Integrability of Solutions of Neutral Fourth-Order Differential Equations. Armenian Journal of Mathematics, [S. l.], v. 11, n. 10, p. 1–17, 2019. Disponível em: https://armjmath.sci.am/index.php/ajm/article/view/265.. Acesso em: 18 may. 2024.