@inproceedings{Black:AAAI:1990, title = {Constraints for the early detection of discontinuity from motion}, author = {Black, M. J. and Anandan, P.}, booktitle = {Proc. National Conf. on Artificial Intelligence, AAAI-90}, pages = {1060-1066}, address = {Boston, MA}, year = {1990}, doi = {} }