@Inproceedings{EPTCS204.1, author = {Arrighi, Pablo and Dowek, Gilles}, year = {2016}, title = {Free fall and cellular automata}, editor = {Mu\~noz, C\'esar A. and P\'erez, Jorge A.}, booktitle = {{\rm Proceedings of the Eleventh International Workshop on} Developments in Computational Models, {\rm Cali, Colombia, October 28, 2015}}, series = {Electronic Proceedings in Theoretical Computer Science}, volume = {204}, publisher = {Open Publishing Association}, pages = {1-10}, doi = {10.4204/EPTCS.204.1}, }