Matthias Rauterberg Morten Fjeld Helmut Krueger Martin Bichsel Ulf Leonhardt M. Meier BUILD-IT: A Computer Vision-based Interaction Technique for a Planning Tool. 303-314 1997 conf/bcshci/1997 BCS HCI db/conf/bcshci/bcshci1997.html#RauterbergFKBLM97