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- [11] Tribological properties of plasma nitrided and hard coated AISI 4140 steel 9TH NORDIC SYMPOSIUM ON TRIBOLOGY NORDTRIB 2000, VOL 2, 2000, 201 : 457 - 468
- [20] Comparison of microstructure and tribological behaviour of plasma nitrided and nitrocarburized AISI 4140 steel KOVOVE MATERIALY-METALLIC MATERIALS, 2006, 44 (03): : 139 - 144