@Article{npg-11-67-2004,
AUTHOR = {Beron-Vera, F. J. and Olascoaga, M. J. and Brown, M. G.},
TITLE = {Passive tracer patchiness and particle trajectory stability in incompressible two-dimensional flows},
JOURNAL = {Nonlinear Processes  in Geophysics},
VOLUME = {11},
YEAR = {2004},
NUMBER = {1},
PAGES = {67--74},
URL = {http://www.nonlin-processes-geophys.net/11/67/2004/},
DOI = {10.5194/npg-11-67-2004}
}