Parwar, S. , Barma, J. , Majumder, A.. "Study of the Effect of Inclusion of TiO2 in Active Flux on Submerged Arc Welding of Low Carbon Mild Steel Plate and Parametric Optimization of the Process by Using DEA Based Bat Algorithm". World Academy of Science, Engineering and Technology, Open Science Index 102, International Journal of Materials and Metallurgical Engineering (2015), 9(6), 698 - 703.