@article{article5eedc372,
title   = {Topology-preserving 'lâmbdaIND.2'-based vortex core line detection for flow visualization},
author = {Schafhitzel, t and Vollrath, J. E. and Gois, João Paulo and Weiskopf, L. and Castelo, Antonio and Ertl, T.},
year = {2008},
journal   = {Computer Graphics Forum}
}