If you are looking for professional "papers" or manuals regarding the sport of beach soccer itself:

: You can view and download the official Pro Beach Soccer Instruction Booklet on Internet Archive .

: The official rules can be found in the Beach Soccer Laws of the Game document hosted by various national associations. Buying a Physical Copy

: A comprehensive Beach Soccer Coaching Manual is available via the FIFA Training Centre . It covers history, tactics, and technical skills.

: High-quality Box Scans for the Game Boy Advance version are also available on Internet Archive . Coaching and Strategy Resources

Since the game is not on digital platforms, you can find used physical copies for PC, PS2, Xbox, or GBA on major marketplaces: BEACH SOCCER Laws of the Game