Delfini, Ron (January 17, 2020). "Parts of a Die". ESI Blog. Engineering Specialties, Inc., 452 Twin Lakes Rd., North Branford, CT. Archived from the original on 2020-05-14. Retrieved January 25, 2021.
Hedrick, Art (July 18, 2018). "Die Basics 101: Intro to Stamping". The Fabricator. FMA Communications, Inc., 2135 Point Blvd., Elgin, IL 60123. Archived from the original on 2020-09-01. Retrieved January 25, 2021.
Hedrick, Art (July 18, 2018). "Die Basics 101: Intro to Stamping". The Fabricator. FMA Communications, Inc., 2135 Point Blvd., Elgin, IL 60123. Archived from the original on 2020-09-01. Retrieved January 25, 2021.
Delfini, Ron (January 17, 2020). "Parts of a Die". ESI Blog. Engineering Specialties, Inc., 452 Twin Lakes Rd., North Branford, CT. Archived from the original on 2020-05-14. Retrieved January 25, 2021.