@article{1102688294, author = {Gardner, R. J.}, title = {Relative width measures and the plank problem.}, journal = {Pacific J. Math.}, volume = {135}, number = {2}, year = {1988}, pages = { 299-312}, language = {en}, url = {http://dml.mathdoc.fr/item/1102688294} }
Gardner, R. J. Relative width measures and the plank problem.. Pacific J. Math., Tome 135 (1988) no. 2, pp. 299-312. http://gdmltest.u-ga.fr/item/1102688294/