1. Wiard/Blacet MINIWAVE
2. The Elektor Quantizer - October 1983 ( french edition)
3. Digisound 80' VDCO
4. KenStone Wavetable

Theory and papers...
The web is full of pages about 'digital audio', FFT ,sampling & co ...
So here is a little selection to start browsing on this topic... Follow links !

1. Theory and Techniques of Electronic Music
2. http://en.wikipedia.org/wiki/Wavetable_synthesis
3. http://en.wikipedia.org/wiki/Fast_Fourier_transform
4. http://local.wasp.uwa.edu.au/~pbourke/other/dft/
5. http://cas.ensmp.fr/~chaplais/wavetour_presentation/
6. Digital audio experiments by Don Cross (french version)