TY - JOUR AU - J. Lewowicz TI - Applications of elementary topological methods to existence problems for bounded solutions of systems of ordinary differential equations JO - Annales Polonici Mathematici PY - 1964 SP - 305 EP - 308 VL - 15 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/ap-15-3-305-308/ DO - 10.4064/ap-15-3-305-308 LA - en ID - 10_4064_ap_15_3_305_308 ER -