@Article{npg-9-189-2002,
AUTHOR = {Fr\"uh, W.-G.},
TITLE = {Methods to describe barotropic vortices by global fields and vortex characteristics},
JOURNAL = {Nonlinear Processes  in Geophysics},
VOLUME = {9},
YEAR = {2002},
NUMBER = {3/4},
PAGES = {189--200},
URL = {http://www.nonlin-processes-geophys.net/9/189/2002/},
DOI = {10.5194/npg-9-189-2002}
}