TY - JOUR AU - CaƱada, A. AU - Zertiti, A. TI - Systems of nonlinear delay integral equations modelling population growth in a periodic environment JO - Commentationes Mathematicae Universitatis Carolinae PY - 1994 SP - 633 EP - 644 VL - 35 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/CMUC_1994__35_4_a4/ LA - en ID - CMUC_1994__35_4_a4 ER -