Tài liệu tham khảo

WikiPedia: Độ cứng Brinell https://web.archive.org/web/20181001114838/http://... http://asm.matweb.com/search/SpecificMaterial.asp?... http://www.iso.org/iso/home/store/catalogue_tc/cat... http://www.iso.org/iso/home/store/catalogue_tc/cat... http://www.iso.org/iso/home/store/catalogue_tc/cat... http://www.iso.org/iso/home/store/catalogue_tc/cat... http://www.astm.org/Standards/E10.htm https://books.google.com/books?id=b-9LdJ5FHXYC https://www.enggstudy.com/brinell-hardness-test/ https://www.youtube.com/watch?v=RJXJpeH78iU