TY - JOUR AU - H. KaczyƄski AU - C. Olech TI - Existence of solutions of orientor fields with non-convex right-hand side JO - Annales Polonici Mathematici PY - 1974 SP - 61 EP - 66 VL - 29 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/ap-29-1-61-66/ DO - 10.4064/ap-29-1-61-66 LA - en ID - 10_4064_ap_29_1_61_66 ER -