F. Driewer, K. Schilling, и H. Baier. IEEE International Workshop on Safety, Security and Rescue Robotics, International Rescue System Institute, Kobe (Japan), (июня 2005)
H. Baier, W. Lenhard, J. Hoffmann, и W. Schneider. Apprentissage, mémoire, analyse sémantique latente LSA, том 8.1 из Studia Informatica Universalis, Hermann éditeurs, Paris, (2010)