TY - JOUR AU - Ding, Changming TI - Orbits connecting singular points in the plane JO - Czechoslovak Mathematical Journal PY - 2005 SP - 125 EP - 132 VL - 55 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/CMJ_2005__55_1_a7/ LA - en ID - CMJ_2005__55_1_a7 ER -