TY - JOUR AU - V. Lakshmikantham AU - A. Richard Mitchell AU - Roger W. Mitchell TI - Maximal and minimal solutions and comparison results for differential equations in abstract cones JO - Annales Polonici Mathematici PY - 1977 SP - 317 EP - 324 VL - 34 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/ap-34-3-317-324/ DO - 10.4064/ap-34-3-317-324 LA - en ID - 10_4064_ap_34_3_317_324 ER -