Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{DCG_1988__3_1-2_131046, author = {Y. Ke and Joseph O'Rourke}, title = {Lower {Bounds} on {Moving} a {Ladder} in {Two} and {Three} {Dimensions.}}, journal = {Discrete & computational geometry}, pages = {197--218}, publisher = {mathdoc}, volume = {3}, number = {1-2}, year = {1988}, zbl = {0646.68059}, url = {http://geodesic.mathdoc.fr/item/DCG_1988__3_1-2_131046/} }
Y. Ke; Joseph O'Rourke. Lower Bounds on Moving a Ladder in Two and Three Dimensions.. Discrete & computational geometry, Tome 3 (1988) no. 1-2, pp. 197-218. http://geodesic.mathdoc.fr/item/DCG_1988__3_1-2_131046/