@phdthesis{oai:repo.lib.tut.ac.jp:00001563,
 author = {Purwo, Kadarno},
 month = {2014-11-19},
 school = {豊橋技術科学大学},
 title = {Improvement of Strength and Quality of Sheared Edge in Punching of High Strength Steel Sheets},
 year = {}
}