JVC Develops World's First Single-sided, Dual Layer DVD-RW Disc Technology
DVD-R DL - Wikipedia
Verbatim - DVD+R DL x 50 - 8.5 GB - storage media - 97000 - DVD & Blu-Rays - CDW.com
DVD Industry Insider Report - The Scoop on DVD-R9 / DVD+R9 | Audioholics
What's the Difference Between Dual-Layer and Double-Sided DVD's? - MajorGeeks
Amazon.com: DVD+R DL Double Layer 8X 8.5GB 240min Video – LSK Media Logo Top, 50 Pack in Spindle | Blank DVDs for Burning Video | DVD Discs Blank | Recordable DVDs : Electronics
What are dual layer DVDs? An explanation of how dual layer DVDs work and their specifications
Why is this 1998 dvd slightly over the limit for dvd5? Dual layer dvds didn't exist till 2003. Is this an early (now useless)form of copy protection? : r/DataHoarder
Dual Layer DVD or DVD-R DL Dual Layer Media
DVD Movie Disc and DVD-ROM Disc Structure
What are dual layer DVDs? An explanation of how dual layer DVDs work and their specifications
Amazon.com: 50 Pack Ridata DVD+R DL Dual Layer 8X 8.5GB DVD Plus R Double Layer White Inkjet Hub Printable Blank Media Data Movie Game Recordable Disc : Electronics