@article{GDZPPN000362999,
title = {On the Union of Jordan Regions and Collision-Free Translational Motion Amidst Polygonal Obstacles.},
journal = {Discrete \& computational geometry},
volume = {1},
year = {1986},
pages = {59-72},
zbl = {0594.52004},
url = {http://dml.mathdoc.fr/item/GDZPPN000362999}
}
Kedem, K.; Livne, Ron; Pach, János; Sharir, Micha. On the Union of Jordan Regions and Collision-Free Translational Motion Amidst Polygonal Obstacles.. Discrete & computational geometry, Tome 1 (1986) pp. 59-72. http://gdmltest.u-ga.fr/item/GDZPPN000362999/