Navajyoti Panda and R. S. Pawar, Optimization of Process Parameters Affecting on Spring-Back in V-Bending Process for High Strength Low Alloy Steel HSLA 420 Using FEA (HyperForm) and Taguchi Technique. [online]. World Academy of Science, Engineering and Technology. September , vol. -2006(9). 1 - 5[viewed 17 October 2018]. Available from: http://waset.org/abstracts/82474 .