1. Improvement of stretch flangeability of ultra high strength steel sheet by smoothing of sheared edge;Mori;Journal of Materials Processing Technology,2010
2. Improvement of formability for expansion of punched hole of ultra-high strength steel sheets by smoothing of sheared edge, Steel Research International;Mori;Special Edition,2011
3. GB/T 15825.4—2008, Sheet metal formability and test methods--Part 4:Hole expanding test.
4. ISO/TS 16630-2003, Metallic materials - Method of Hole Expanding Test.