Iris Reinbacher Marc Benkert Marc J. van Kreveld Joseph S. B. Mitchell Jack Snoeyink Alexander Wolff Delineating Boundaries for Imprecise Regions. 386-414 2008 50 Algorithmica 3 http://dx.doi.org/10.1007/s00453-007-9042-5 db/journals/algorithmica/algorithmica50.html#ReinbacherBKMSW08