Reference

Rubik's cube on the Internet.

Georges HELM 
Rubik's cubes and related puzzles - By Georges

Jaap Scherphuis
Rubik's Cube 3x3x3 - By Jaap

Jessica Fridrich
My speed cubing page - By Jessica

Lars Petrus
Solving Rubik's Cube for speed - By Lars

Michael Reid
Rubik's cube information - By Michael

Nader
Computer solving Rubik's cube - By Nadar 

The Spiegel solution as a video
Rubik on-line video - By Spiegel

Ernö Rubik's Official Homepage Stefan Pochmann
Stefan Pochmann's Cube Corner

Volkmar Grandy
Rubik Jazz - By Volkmar