TY - JOUR AU - A. Bellen TI - Monotone Methods for Periodic solutions of Second Order Scalar Functional Differential Equations. JO - Numerische Mathematik PY - 1983 SP - 15 EP - 30 VL - 42 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/NUMA_1983__42_132858/ ID - NUMA_1983__42_132858 ER -