Apple slams PSP, DS at iPhone/iPod conference - GameSpot
Garaph - DS vs PSP
Chart: Sony Trumps Nintendo in Shrinking Console Market | Statista
Nintendo 3DS Reaches 5 Million In Japan, Breaks Record - Siliconera
Sony PSP Versus Nintendo DS - The Sales Showdown - Pure Nintendo
Games: Nintendo – the winner takes it all – eurotechnology.com
Report: PSP game sales robust, DS sales amazing | Ars Technica
On the 802 11 Turbulence of Nintendo DS
Who won? First-week sales of PS Vita vs. PSP vs. 3DS vs. DS (infographic) | VentureBeat
Nintendo vs Sony: Who's winning the console war in handheld gaming? | IG EN
CHART OF THE DAY: iPad Estimate Sales Vs. iPhone, iPod, Nintendo
PS Vita being outsold by the PSP in Europe too | eTeknix
Switch vs DS – VGChartz Gap Charts – October 2017 Update
Third Quarter Financial Results Briefing for Fiscal Year Ended March 2010
Nintendo's Switch to Success: 20 Years of Nintendo Console Sales
Nintendo's Switch to Success: 20 Years of Nintendo Console Sales
Japan's October Hardware Sales | TheSixthAxis
PlayStation 2 Best-Selling Game Console of All Time: Report | Beebom
PlayStation Portable | Video Game Sales Wiki | Fandom
PlayStation Portable - Wikipedia
3DS vs PSP – VGChartz Gap Charts – October 2018 Update
Nintendo Didn't Expect 3DS Sales to Drop Like This | WIRED
