Semi-Annual Financial Results Briefing for Fiscal Year Ending March 2012
PSP and DS sales running close to even in Japan – Destructoid
Apple slams PSP, DS at iPhone/iPod conference - GameSpot
Hand to hand combat: Nintendo 3DS vs PlayStation Vita
PlayStation Portable - Wikipedia
Report: PSP game sales robust, DS sales amazing | Ars Technica
Exclusive: Sony PSP Versus Nintendo DS - The Sales Showdown
PlayStation Portable | Video Game Sales Wiki | Fandom
The first 2 years: PSP has sold better in the US than PS1, DS, more | Engadget
Sony PSP vs. Nintendo DS - IGN
Sony PSP Versus Nintendo DS - The Sales Showdown - Pure Nintendo
3DS vs PSP – VGChartz Gap Charts – October 2018 Update
Nintendo DS - Wikipedia
DS Lite vs. PSP: who has the best picture quality? | Engadget
Semi-Annual Financial Results Briefing for Fiscal Year Ending March 2012
How Sony tried (and failed) to beat Nintendo at handheld gaming | TechRadar
Analysis: PSP Go To Face 'Slow Death At Retail' In U.S.?
PSP & PSV unit sales worldwide 2004-2022 | Statista
Nintendo vs Sony: Who's winning the console war in handheld gaming? | IG Bank Switzerland
You Decide: Sony PSP or Nintendo 3DS? | HowStuffWorks
Popularity of Nintendo DS Begins to Curb, PS3 Sales on the Rise in Japan | TechPowerUp
PS Vita being outsold by the PSP in Europe too | eTeknix
Why is the PSP less popular than the Nintendo ds? - Quora
Nintendo Didn't Expect 3DS Sales to Drop Like This | WIRED
Nintendo's Switch to Success: 20 Years of Nintendo Console Sales
Wii, XBox, PS3, Nintendo DS, Gameboy Advance, PSP, iPhone, iPad: global market share and sales comparison | Got Schwartz?
Switch vs DS – VGChartz Gap Charts – October 2017 Update
