@article{CTGDC_1980__21_4_377_0, author = {Lawvere, F. William}, title = {Toward the description in a smooth topos of the dynamically possible motions and deformations of a continuous body}, journal = {Cahiers de Topologie et G\'eom\'etrie Diff\'erentielle Cat\'egoriques}, volume = {21}, year = {1980}, pages = {377-392}, mrnumber = {606383}, zbl = {0472.18009}, language = {en}, url = {http://dml.mathdoc.fr/item/CTGDC_1980__21_4_377_0} }
Lawvere, F. William. Toward the description in a smooth topos of the dynamically possible motions and deformations of a continuous body. Cahiers de Topologie et Géométrie Différentielle Catégoriques, Tome 21 (1980) pp. 377-392. http://gdmltest.u-ga.fr/item/CTGDC_1980__21_4_377_0/