TY - JOUR AU - Karima Bessioud AU - Abdelouaheb Ardjouni AU - Ahcene Djoudi TI - Positivity and Periodicity in Nonlinear Neutral Mixed Type Levin-Nohel Integro-Differential Equations JO - Kragujevac Journal of Mathematics PY - 2025 SP - 253 VL - 49 IS - 2 UR - http://geodesic.mathdoc.fr/item/KJM_2025_49_2_a5/ LA - en ID - KJM_2025_49_2_a5 ER -