A geometric proof of the Affability Theorem for planar tilings
  We give a geometric proof of the Affability Theorem of T. Giordano, H. Matui, I. Putnam and C. Skau for aperiodic and repetitive planar tilings. 
Fernando Alcalde Cuesta, Pablo Gonz\'alez Sequeiros, \'Alvaro Lozano   Rojo
math.DS