@INPROCEEDINGS { steels:97a, address = {Berlin},author = {Steels, Luc},booktitle = {Proceedings of the Ninth European Conference on Machine Learning},editor = {van Someren, M. and Widmer, G.},note = {Language},pages = {4--13},publisher = {Springer-Verlag},title = {Constructing and Sharing Perceptual Distinctions},type = {INPROCEEDINGS},year = {1997},}