M. J. Little R. David Etchells Jan Grinberg S. P. Laub J. G. Nash M. W. Yung The 3-D Computer. 79-87 1990 2 VLSI Signal Processing 2 http://dx.doi.org/10.1007/BF00934998 db/journals/vlsisp/vlsisp2.html#LittleEGLNY90