1. An improved method of joining and welding metals;Klopstock,1982
2. Friction welding in the reconditioning of worn components;Tyayar;Weld Prod.,1959
3. Friction welding and hardfacing of agricultural machine parts;Zakson;Avt. Svarka,1965
4. Friction surfacing;Thomas;Weld. Inst. Res. Bull.,1984
5. Feasibility studies into surfacing by friction welding;Thomas,1984