@article{GDZPPN000363812,
title = {A Nonuniform Matroid Which Violates the Isotopy Conjecture.},
journal = {Discrete \& computational geometry},
volume = {4},
year = {1989},
pages = {1-2},
zbl = {0657.05019},
url = {http://dml.mathdoc.fr/item/GDZPPN000363812}
}
White, N. L. A Nonuniform Matroid Which Violates the Isotopy Conjecture.. Discrete & computational geometry, Tome 4 (1989) pp. 1-2. http://gdmltest.u-ga.fr/item/GDZPPN000363812/