Puzzle Book for Adults: Killer Sudoku, Kakuro, Numbricks and Other Math Puzzles for Adults: Volume 9 (Game, Puzzle and Activity Books): Amazon.co.uk: Coloring Books, Mindful: 9781987595321: Books
Kakuro-Sudoku Hybrid Puzzle — Rätselportal — Logic Masters Deutschland
Killer sudoku puzzles and Kakuro.: Easy - medium levels. (Killer sudoku and his friends): Holmes, Basford: 9781075398704: Amazon.com: Books
Sudoku and Kakuro | 360
Sudoku embedded in a Kakuro – Paramesis Puzzle Blog