Heinrich Niemann Heinz Brünig Richard Salzbrunn Stefan Schröder Interpretation of Industrial Scenes by Semantic Networks. 39-42 1990 MVA http://b2.cvl.iis.u-tokyo.ac.jp/mva/proceedings/CommemorativeDVD/1990/papers/1990039.pdf conf/mva/1990 db/conf/mva/mva1990.html#NiemannBSS90