Dehn surgeries on 2-bridge links which yield reducible 3-manifolds
  We determine the Dehn surgeries on 2-bridge links, which yield reducible 3-manifolds. Further, we show the conditions that we obtain a torus or cable knot from one component of a 2-bridge link by a surgery on another component. 
Hiroshi Goda, Chuichiro Hayashi, Hyun-Jong Song