4Mazunder B,Saikia P C,Sain B.Desulfurization of High-sulfur Coals of North-east India Coal Fields by Organomentallic Compounds[J].Fuel,1989,68(3):610-615.
5Suggyullathy L.The Role of Microwave Irmdiation in Coal Desulfurization with Molten Caustics[J].Fuel Science and Technology,1992,10(17):167-174.