1. Disjoint homotopic paths and trees in a planar graph

   • A. Schrijver

   OriginalPaper 26 June 2007 Pages: 527 - 574

2. On translating one polyomino to tile the plane

   • D. Beauquier
   • M. Nivat

   OriginalPaper 26 June 2007 Pages: 575 - 592

3. Onk-sets in arrangements of curves and surfaces

   • Micha Sharir

   OriginalPaper 26 June 2007 Pages: 593 - 613