@Article{,
author = { Helmut Alt and Hans Bodlaender and Marc van Kreveld and G{\"u}nter Rote and Gerard Tel },
title = { Wooden Geometric Puzzles: Design and Hardness Proofs },
journal = { Theory Comput. Syst. },
year = { 2009 },
volume = { 44 },
pages = { 160--174 },
}
