?url_ver=Z39.88-2004&rft_id=10.1051%2Fmatecconf%2F20141304017&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Ibrahim%2C+N.N.M.&rft.aulast=Ibrahim&rft.aufirst=N.N.M.&rft.date=2014&rft.issn=2261236X&rft.title=Microstructure+and+hardness+of+high+temperature+gas+nitrided+aisi+420+martensitic+stainless+steel&rft.genre=proceeding