1.
Ardjouni A, Djoudi A. EXISTENCE OF POSITIVE PERIODIC SOLUTIONS FOR A NONLINEAR NEUTRAL DIFFERENCE EQUATION WITH VARIABLE DELAY. J. Nonlinear Anal. Optim. [internet]. 2013 Aug. 12 [cited 2026 Oct. 14];4(2):31-8. available from: https://ph03.tci-thaijo.org/index.php/jnao/article/view/2700