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@article{DCG_1989__4_6_131059, author = {N. L. White}, title = {A {Nonuniform} {Matroid} {Which} {Violates} the {Isotopy} {Conjecture.}}, journal = {Discrete & computational geometry}, pages = {1--2}, publisher = {mathdoc}, volume = {4}, number = {6}, year = {1989}, zbl = {0657.05019}, url = {http://geodesic.mathdoc.fr/item/DCG_1989__4_6_131059/} }
N. L. White. A Nonuniform Matroid Which Violates the Isotopy Conjecture.. Discrete & computational geometry, Tome 4 (1989) no. 6, pp. 1-2. http://geodesic.mathdoc.fr/item/DCG_1989__4_6_131059/