There's been research done on Dvorak? I remember a few years ago, when I was trying to learn it, I ended up looking into it and finding nothing but "this person

There's been research done on Dvorak? I remember a few years ago, when I was trying to learn it, I ended up looking into it and finding nothing but "this person can type faster on Dvorak than QWERTY!", ie. no actual studies with controls and all that, so I wound up giving up. Got any cites? (I'm not doubting you, I'm genuinely curious.)